What Is Epilepsy? Symptoms, Causes, Diagnosis, Treatment, and Prevention

Epilepsy is a chronic neurological disorder in which the normal chemical and electrical activities between nerve cells in the brain (neurons) become disturbed. This disturbance causes the neurons to fire abnormally, resulting in seizures.

In a seizure, many neurons fire at the same time, much faster than usual — up to 500 times a second.

According to the U.S. Centers for Disease Control and Prevention (CDC), in 2015 about 3 million adults and 470,000 children and adolescents had “active” epilepsy nationally. This means they’re being treated for the condition, or they have had a seizure in the past year.

Signs and Symptoms of Epilepsy

Seizures are the best-known symptom of epilepsy.

People often think epileptic seizures cause muscle spasms or loss of consciousness, but some seizures can instead cause sudden emotions, sensations, or behaviors that may seem inappropriate and may not be initially recognized as caused by epilepsy.

Some people with epilepsy stare off into space or make strange sounds during a seizure. Some people may undress, laugh, or walk in circles.

Depending on the part of the brain affected and the severity of the disturbance in the brain, epileptic seizures can range from relatively benign events that happen rarely to recurrent, disabling, life-threatening emergencies.

Regardless of the seizure type, a person generally must have had at least two “unprovoked” seizures at least 24 hours apart to be diagnosed with epilepsy. For a seizure to be unprovoked, it can’t have another known cause aside from the disturbed brain activities that are considered epilepsies.

In discussing epilepsy, doctors often refer to seizure types, epilepsy types, and epilepsy syndromes.

Seizure type is classified based on the initial manifestation of the seizure as generalized, focal, or unknown, depending on the extent of the seizure’s activity in the brain.

There are many types of seizures in each of these categories. In fact, doctors have described more than 30 different types of seizures.

The symptoms of the seizures will vary depending on the part of the brain affected.

Generalized Seizures

In generalized seizures, the abnormal neuronal activity spreads across both halves (“hemispheres”) of the brain. Generalized seizures have both motor (movement) and nonmotor (absence) symptoms.

People having a generalized seizure are generally not aware of their surroundings, so observers should try to be alert to the person’s safety.

Some types of generalized seizures include:

  • Absence Seizures Previously known as “petit mal” seizures, absence seizures are more common in children. This type of seizure may last only seconds and is sometimes confused with daydreaming. The person is usually unresponsive, but people having an “atypical” absence seizure may be able to respond a little.
  • Atonic Seizures These are also known as “drop attacks” or “drop seizures.” The person’s normal resting muscle tension (called “tone”) goes limp. If the person is sitting, they may suddenly slump over. If they are standing, they may drop like a rag doll to the ground.
  • Myoclonic Seizures These seizures are sudden body “jolts” or increases in muscle tone that make it seem as if the person has been jolted with electricity. A myoclonic seizure is similar to the sudden jerks people often experience as they are falling asleep, but these latter “sleep myoclonic” jerks are harmless, while myoclonic seizures aren’t. A subtype of myoclonic seizures, infantile spasms, typically begin in children between 3 and 12 months old and may persist for several years. They typically consist of a sudden jerk followed by stiffening. This particularly severe form of epilepsy can have lasting effects on a child.
  • Tonic Seizures In this kind of seizure, the person’s muscle tone suddenly stiffens and they lose consciousness. They may also fall to the ground, but they fall in a rigid manner, more like a tree trunk than a rag doll.
  • Clonic Seizures This type of seizure causes a person’s muscles to spasm and jerk; the muscles in the elbows, legs, and neck flex and relax in rapid succession. The jerking motion slows down as the seizure subsides and finally stops altogether.
  • Tonic-Clonic Seizures Previously known as “grand mal” seizures, these are the kind of convulsions that people often associate with epilepsy. The person becomes rigid, as with a tonic seizure, and then muscle jerking (known as “clonus”) begins.

If you see a person having an apparent seizure of any kind, do what you can to ensure the person’s safety, and make note of the time. Tonic-clonic seizures lasting more than 5 minutes are considered to be a medical emergency, and you should call 911 if you observe one.

People having a tonic-clonic seizure may lose control of their bladder or bowels, and they will feel exhausted and sore after the seizure (known as the “postictal” period).

Focal Seizures

About 60 percent of people with epilepsy have focal seizures. Focal seizures originate in one part of the brain and stay in just one hemisphere of the brain.

Focal epilepsies are also known as “localization-related” epilepsies; they were previously referred to as “partial” epilepsies.

Many focal epilepsies have an “aura,” or warning symptoms of an upcoming seizure. The person experiencing the aura is conscious.

Focal seizure symptoms are subdivided into motor (movement), sensory, autonomic, and psychic.

A focal seizure with motor symptoms typically causes jerking movements of a foot, the face, an arm, or another part of the body, while a focal seizure with sensory symptoms affects a person’s hearing or sense of smell or may cause them to experience hallucinations.

A focal seizure with autonomic symptoms affects the part of the brain responsible for involuntary functions, causing changes in blood pressure, heart rate, or bowel or bladder function. Finally, focal seizures can strike the parts of the brain that trigger emotions or memories, causing feelings of fear, anxiety, or déjà vu (the feeling that something has been experienced before).

Because focal seizures only involve part of the brain, symptoms are often not as extensive as generalized seizures. Focal symptoms often involve only one side of the body instead of both.

Focal seizures are further classified by level of awareness: aware, impaired awareness, or unknown awareness.

The types of focal seizures, by level of awareness, are:

  • Focal Aware Seizure (Previously Called Simple Partial) During a focal aware seizure, the person is awake, and they will be able to recall the seizure afterward. They may be “frozen” and unable to respond, or they may be able to tell you what is happening. These seizures may last from a few seconds to a couple of minutes, and the person will usually be able to resume normal activity afterward, although a focal aware seizure may sometimes be a sign that a more severe seizure is still to come.
  • Focal Impaired Awareness Seizure (Previously Called Complex Partial) During this kind of seizure, there may be slightly impaired awareness, or awareness may be severely impaired. The person having the seizure may perform activities that seem purposeful, but it’s as if there’s “nobody home.” The actions can be fairly simple, like lip-smacking, or they may be complex actions, like walking, removing clothing, thrusting the pelvis, or bicycling the legs. They may seem like they are daydreaming, but they can’t be startled out of it, unlike a person who is daydreaming.

Some seizures start as a focal impaired awareness seizure and then progress to a generalized tonic-clonic seizure.

Remember, any tonic-clonic seizure lasting over five minutes should prompt a call to 911.

Combined and Unknown Seizure Types

Generalized and Focal Seizures Some epilepsies include both focal and generalized seizures, particularly some of the syndromes of early childhood, such as Dravet syndrome and Lennox-Gastaut syndrome. Some seizures begin as a focal seizure and then spread to both sides of the brain to become a generalized tonic-clonic seizure, a characteristic that used to be called “secondarily generalized seizures,” but is now called “focal onset bilateral tonic-clonic seizures.”

Learn More About Dravet Syndrome

Unknown Onset Seizures This term is used to describe epilepsies that seem like generalized seizures even though they’re actually caused by a focal lesion of the brain. This seizure classification is also used for people who seem to have had a generalized seizure but whose diagnostic tests are inconclusive or unavailable.

Learn More About Signs and Symptoms of Epilepsy

Types of Epilepsy

Epilepsies are often grouped by a complex set of characteristics that mark a type as a known “syndrome.” They are also sometimes described by their symptoms or by the part of the brain affected.

Examples of Some Epilepsy Syndromes

Hundreds of different epilepsy syndromes have been identified.

Some epilepsies can co-occur with or lead to developmental delays. Other epilepsies have no effect on cognitive development.

Here are some of the most common epilepsy syndromes:

  • Childhood Absence Epilepsy (CAE) People with this epilepsy syndrome have staring spells that last 10 to 20 seconds and then end abruptly. This was previously called “petit mal” epilepsy and is most common in children. CAE often responds to medical treatment and disappears by adolescence.

  • Juvenile Absence Epilepsy (JAE) JAE is different from childhood absence epilepsy (CAE). The seizures tend to last longer, and the person may have this epilepsy for the rest of their life. About 80 percent of people with JAE will also have tonic-clonic seizures. JAE will often respond to treatment, but that treatment tends to be lifelong.

  • Juvenile Myoclonic Epilepsy (JME) Usually seizures take place within an hour of awakening, but they can happen at any time of day. People with JME can have absence seizures, myoclonic (muscle-jerking) seizures, and generalized tonic-clonic seizures. Common triggers include sleep deprivation and stress, or exhaustion after excessive alcohol intake.

    It’s possible for kids to grow out of JME, but the vast majority will need to take epilepsy medication for the duration of their lives.
  • Childhood Epilepsy With Centrotemporal Spikes (Previously Known as Benign Rolandic Epilepsy) This is a focal seizure type that appears in children ages 3 to 12 years. Half of the face may begin to twitch, and numbness of the face or tongue can occur. These seizures usually occur at night, often during sleep. For most children, seizures cease by age 13, although they can continue to age 18.

  • Reflex Epilepsies With reflex epilepsy syndromes, a certain stimulus can trigger a generalized tonic-clonic (grand mal) seizure. The most common reflex epilepsy syndrome is photosensitive epilepsy, where flashing lights can trigger a seizure. This can make it a problem to watch TV, play video games, or even observe light through the trees. Other reflex epilepsy triggers can be auditory, like a song or church bells. Some people have tactile triggers, such as a hot bath or toothbrushing. The best way to prevent a seizure is to avoid the trigger, but that is not always possible.

  • Sleep-Related Epilepsy Syndromes Some epilepsies relate directly to sleep or to immediate arousal from sleep. Examples include sleep-related hypermotor epilepsy (SHE; previously known as nocturnal frontal lobe epilepsy) and nocturnal temporal lobe epilepsy (NTLE). As with childhood epilepsy with centrotemporal spikes, sleep-related epilepsy syndromes are sometimes not caught unless someone has a seizure with motor symptoms in their sleep.

Characteristics of Epilepsies Based Upon Brain Region

Because different parts of the brain perform different functions, seizure activities in different areas can have distinct symptoms.

Here are some examples of epilepsy syndromes characterized by the regions of the brain that are affected:

  • Temporal Lobe Epilepsy (TLE) TLE often has an aura of déjà vu, fear, or an unusual smell or taste. Another common symptom is “gastric rising,” a sensation of a flutter in the stomach or like the stomach is on a roller coaster. TLE often begins in childhood or in the teen years. A TLE seizure can look like a staring spell, or the person may engage in pointless repetitive behaviors, called automatisms. Some common automatisms include picking at clothing, smacking the lips, eye blinking, and unusual head movements. TLE is associated with damage to the hippocampus, called mesial temporal sclerosis (MTS) or hippocampal sclerosis (HS). Damage to the hippocampus can also interfere with learning and memory.

  • Frontal Lobe Epilepsy This often affects movement. A person who has frontal lobe epilepsy may have muscle weakness and abnormal movements, like twisting, waving the arms and legs, or grimacing during seizures. The person may be startled and even scream. Some frontal lobe seizures can even present as psychosis. There is often some loss of awareness, and some frontal lobe seizures happen when the person is asleep.

  • Neocortical Epilepsy This type of epilepsy can be generalized or focal. The cortex is the outer layer of the brain, and seizure symptoms can vary from unusual sensations to visual hallucinations, emotional changes, or convulsions.

  • Occipital Lobe Epilepsy This rare type of epilepsy involves recurring seizures originating in the part of the brain responsible for vision. It’s characterized by seizures that include visual changes (such as flashing lights). These visual distortions can occur on either side of one’s field of vision, depending on which cortex is affected.

  • Hypothalamic Seizures This rare type of epilepsy begins in childhood and is caused by a noncancerous tumor of the hypothalamus, a region at the base of the brain. Hypothalamic hamartoma is often difficult to diagnose, as the seizures can seem like laughing (“gelastic” seizures) or crying (“dacrystic” seizure).

Causes and Risk Factors of Epilepsy

For about half of those with epilepsy, the cause is not known, even with a complete medical evaluation.

The 2017 International League Against Epilepsy lists six major categories of causes (known as “etiologies”) of the condition: genetic, structural, metabolic, immune, infectious, and unknown.

 (The terms “idiopathic,” “symptomatic,” and “cryptogenic” were eliminated in 2010.) In some cases, combinations of these categories best describe the causes of seizures.
  • Genetic Etiology This describes epilepsy that is the direct result of a known or presumed genetic defect. Even though very few people with epilepsy have a known genetic mutation, this is changing rapidly with advances in testing.
  • Structural Etiology In this type of case, seizures are caused by changes in the structure of a part of the brain. A person can be born with these structural abnormalities (in which case they’re called “congenital”), or these structural abnormalities can be the result of processes like head trauma, an infection, or a stroke.
  • Metabolic Etiology This is when a documented metabolic condition leads to an increased risk of epilepsy.
  • Immune Etiology In these cases, there is evidence that inflammation of the central nervous system is leading to epilepsy, such as with some kinds of autoimmune encephalitis.
  • Infectious Etiology This is one of the most important causes of epilepsy worldwide. Infections that can lead to epilepsy include human immunodeficiency virus (HIV), malaria, tuberculosis, and a parasitic infection known as cysticercosis.
  • Unknown Etiology This description is used when none of the causes listed above are believed to significantly contribute to the cause of the epilepsy. Previously referred to as “cryptogenic,” this classification is common, accounting for about one-third of epilepsy cases.

Epilepsy Triggers

Causes of epilepsy are not the same as triggers. Seizure triggers don’t cause epilepsy, but they can lead to an epileptic seizure in someone who is already susceptible.

Common seizure triggers include stress, sleep deprivation, dehydration or missing meals, and consumption of or withdrawal from alcohol or drugs.

A significant proportion of epilepsies of childhood causes are genetic, metabolic, or the person was born with a structural problem in the brain. Epilepsy in adults is more likely to be caused by structural changes acquired over time, like tumors or strokes.

Seizures Not Caused by Epilepsy

It’s important to note that not all seizures are caused by epilepsy. Acute neurological problems, such as a stroke or head injury, can also cause a seizure. Metabolic problems, such as hypoglycemia — a common side effect of insulin therapy — and drug intoxication can sometimes cause seizures.

In infants and children, a high fever can cause seizures. And even stress, missing meals, or sleep deprivation can bring on seizures in some individuals.

Psychogenic nonepileptic seizures (PNES) are believed to be a type of disorder called a conversion disorder, in which physical symptoms don’t have an underlying physical cause. People with PNES look like they’re having epileptic seizures, but their symptoms are not caused by abnormal brain electrical discharges, as in epilepsy. Instead, they have a psychological cause. People who have epilepsy can also have PNES simultaneously. PNES can be treated by a knowledgeable mental healthcare professional.

Many of the same tests used to diagnose epileptic seizures are also used to diagnose nonepileptic seizures.

Learn More About Nonepileptic Seizures

How Is Epilepsy Diagnosed?

A variety of tests are used to look for evidence of epilepsy and to rule out other possible causes of seizures.

One of the main tools used in the diagnosis of epilepsy is the electroencephalogram, or EEG. An EEG records the brain’s electrical activity and can reveal the abnormal electrical brain activity that causes epilepsy.

Sometimes brain imaging is done using MRI or computed tomography (CT) to look for structural abnormalities in the brain that may be causing seizures.

A person’s medical history also provides important clues to the underlying cause of seizures.

Learn More About Diagnosing Epilepsy

Prognosis of Epilepsy

Epilepsy is a potentially life-threatening condition, and it carries a risk of premature death if it’s not properly diagnosed and treated.

Children and young adults diagnosed with the condition — roughly half of all cases of epilepsy are diagnosed in people age 25 years or younger — aren’t likely to see any reduction in their life expectancy from epilepsy, particularly if they’re on a medication that effectively controls their seizures.

Older adults who develop epilepsy are more likely to die from the condition or one of its complications, but many go on to live otherwise healthy lives.

Duration of Epilepsy

How long you will experience epilepsy symptoms depends on the type of epilepsy you have and what’s causing it.

Up to 60 percent of people with epilepsy will be seizure-free after using the first seizure medication they try; one in four adults will develop uncontrolled epilepsy; and others will experience occasional seizures.

Nearly 75 percent of children who develop epilepsy will be seizure-free within two years of starting treatment, while fewer than 10 percent of children go on to develop uncontrolled epilepsy.

In general, most doctors will consider lowering the dose or even discontinuing your seizure medication if you’ve been seizure-free for two to four years. But many people with epilepsy will need to remain on medication for longer periods in order to keep their symptoms under control.

You shouldn’t stop taking your seizure medication without consulting with your doctor.

Treatment and Medication Options for Epilepsy

The first type of treatment usually offered for epilepsy is an antiseizure medication (ASM) or anti-epileptic drug (AED), of which there are more than 20. Typically, antiseizure drugs are started at a low dose, and the dosage is gradually increased to find the proper dose for the person.

Medication Options

Most people with epilepsy can become seizure-free by taking an antiseizure medication. Some may need to take a combination of ASMs to control their seizures.

Finding the right medication and dose can be difficult. In helping you find the right ASM, your doctor will consider your condition, the frequency of your seizures, your age, and any other health conditions you may have, as well as any medications you may be taking for them.

To start, your doctor will prescribe a single medication at a relatively low dose, increasing the dose gradually until your seizures are controlled.

Depending on the medication, ASMs can have side effects. Among the most common mild side effects are:

  • Fatigue
  • Dizziness
  • Weight gain
  • Loss of bone density (osteoporosis)
  • Rashes
  • Balance and coordination difficulties
  • Speech problems
  • Memory loss
  • Trouble concentrating

More serious, but rare, side effects include:

To get the most from your drug treatment — and to maximize control of your seizures — you should take medications as prescribed and call your doctor before switching to a generic version of your medication or taking other prescription medications, over-the-counter drugs, or herbal remedies for your epilepsy or other health problems.

Don’t discontinue your ASM without talking to your doctor, and contact your doctor as soon as possible if you experience feelings of depression, suicidal thoughts, or unusual changes in your mood or behaviors.

Medical Marijuana and CBD

In June 2018, the U.S. Food and Drug Administration (FDA) approved the drug cannabidiol (Epidiolex), which is derived from the cannabis plant, for the treatment of Lennox-Gastaut syndrome and Dravet syndrome.

Epidiolex is made from purified cannabidiol (CBD), an ingredient found in marijuana. The medication does not contain THC, the primary psychoactive component in marijuana that causes the “high” associated with its use.

Epidiolex has been found to reduce seizure frequency in children and young adults with these epilepsy syndromes.

It has also been studied or used off-label for genetic epilepsy syndromes and for febrile infection-related epilepsy syndrome, according to research from 2020. And many more studies of purified cannabidiol for epilepsy are in the pipeline.

Surgery for Epilepsy

More than half of those newly diagnosed with epilepsy will become seizure-free with their first medication. If anti-epileptic medications don’t work, your doctor may recommend surgery.

Surgery can be beneficial if scans of your brain reveal that your seizures originate in a small, well-defined area of your brain, and its removal won’t interfere with speech, language, motor function, vision, or hearing.

In most epilepsy surgeries, the neurosurgeon removes the area of your brain causing your seizures. Traditional surgery requires opening up the skull to access the part of the brain to be removed. A newer type of surgery, called stereotactic laser ablation, can be done through a small hole in the skull. “Stereotactic” refers to the use of medical imaging technologies that allow the surgeon to precisely place a medical instrument in the brain.

In stereotactic laser ablation, the surgeon uses CT or MRI images to guide a laser through the brain to the cells causing the seizure. The laser is then used to burn, or “ablate,” these cells.

Even after successful surgery, some people may need to continue taking an antiseizure medication to prevent seizures, but they may be able to take fewer drugs at reduced doses.

Neurostimulation Options

An alternative to surgery for some people with epilepsy is neurostimulation, in which either the vagus nerve or parts of the brain are stimulated with electrical pulses to stop seizures and possibly prevent them.

Vagus Nerve Stimulation In this approach, a device called a vagus nerve stimulator is implanted under the skin of your chest and connected to the vagus nerve in your neck with a wire. The battery-powered device sends pulses of electrical energy through the vagus nerve to your brain, reducing the number and severity of seizures.

Deep Brain Stimulation In this approach, a neurosurgeon implants electrodes into a specific part of your brain, usually your thalamus. The electrodes are connected to a generator implanted in your chest or your skull, and they send electrical pulses to your brain to control seizures.

Responsive Neurostimulation An implantable, pacemaker-like device has been shown to stop seizures through a process called responsive neurostimulation. The device is designed to analyze brain activity patterns to detect seizures before they occur and deliver an electrical charge to the affected area of the brain to stop them.

Ongoing research suggests that long-term use of the device may also reduce the likelihood of seizures occurring in the first place.

Continuous Stimulation Researchers are also experimenting with a technique called continuous stimulation. In this approach, an electrical charge is applied to the seizure onset zone, or the area of the brain where seizures originate, to interrupt them.

The approach may be particularly helpful in people who have seizures that start in an area of the brain that can’t be removed during surgery because it would affect speech and other functions.

Alternative and Complementary Therapies

Some people with epilepsy try alternative and complementary therapies, including:

Although the research supporting the effectiveness of these approaches is limited, some people say they have helped them manage their seizures.

Acupuncture is a traditional Chinese treatment in which a practitioner inserts thin needles into your skin at various points (called acupoints) around your body — in the case of epilepsy, usually around the ear. Acupuncture has been shown to reduce pain in people with arthritis and migraine, and it appears to reduce seizure frequency and severity in some people.

Vitamin E is thought to act upon some of the brain processes that are involved in epilepsy. As a result, some studies have shown that people on anti-epileptic drugs who also take vitamin E supplements have fewer seizures and fewer signs of epilepsy on brain electroencephalograms.

Multiple herbal remedies have been used to treat epilepsy in the United States, including, most notably, mugwort and valerian. Research supporting their safety and effectiveness in people with epilepsy is limited, and there’s no evidence they reduce seizure frequency or severity.

Although most herbal supplements are generally safe, some can make your seizures worse, cause side effects, or affect how your epilepsy medicines work. Talk to your doctor before taking any herbal supplement.

Depending on what triggers your seizures, stress reduction may help limit their frequency — and help improve your overall health and sense of well-being at the same time.

Physical activity such as walking, swimming, or bike riding has been shown to help people with epilepsy, as exercise also calms the abnormal electrical brain activity that triggers seizures. Talk to your doctor before starting a new exercise program to make sure it’s right for you and your epilepsy.

In general, you should avoid activities that could be dangerous if you have a seizure — like skiing. And, if you’re out and about exercising, be sure to wear a medical alert bracelet, just in case you have a seizure.

Yoga can also help reduce stress, as it combines exercise with deep breathing and meditation to strengthen your body and calm your mind.

Meditation can redirect your mind away from stress and the specific thoughts causing it. In particular, mindfulness meditation may help reduce seizures and improve mood in people with epilepsy.

Music therapy may help children with epilepsy. In the 1990s, researchers discovered that children with epilepsy had less abnormal brain activity and fewer seizures when they listened to a Mozart sonata called K448. This is referred to as the Mozart effect.

But some forms of music may trigger seizures, so talk to your doctor before experimenting with music therapy for yourself or your child.

Finally, the so-called keto diet — a high-fat, low-carbohydrate diet — has been shown to control seizures in some people with epilepsy, according to the Epilepsy Foundation. You shouldn’t start the diet on your own — it must be prescribed by your doctor and monitored by a dietitian, because it requires careful measurement of calorie, fluid, and protein intake.

The diet has proved most effective in children with seizures that don’t respond to antiseizure medications, the Epilepsy Foundation says.

Its full name is the ketogenic diet because it causes your body to produce ketones, or acids that are formed when the body uses fat as its source of energy. Higher blood ketone levels are believed to lead to improved seizure control.

Learn More About Treatment for Epilepsy: Medication, Alternative and Complementary Therapies, Surgery Options, and More

Prevention of Epilepsy and Seizures

There’s no proven way to prevent all forms of epilepsy. But there are ways to reduce your risk for the condition.

An infection called cysticercosis is thought to be the most common cause of epilepsy globally, and it’s transmitted to humans from a parasite, the CDC says. It’s most common in areas of Latin America, Asia, and Africa with poor sanitation, and it’s relatively uncommon in the United States and Europe. You can reduce your risk of infection by practicing good personal hygiene — such as washing your hands regularly — and using safe food preparation practices, including regularly cleaning surfaces in your kitchen.

Another common cause of epilepsy is traumatic brain or head injuries. Of course, you can’t prevent all accidents, but you can reduce your risk for head injuries by wearing a helmet when playing sports such as hockey or when riding a skateboard or bicycle, for example.

Wearing seatbelts while riding in the car and making sure to use child safety seats for babies and younger children can also help.

Reducing your risk of heart attack and stroke can also help lower your risk of developing epilepsy later in life, as some epilepsies are caused by these serious health events. Following a healthy diet, exercising regularly, and reducing stress can help you maintain heart and blood vessel health.

Finally, some epilepsies have been linked with complications during pregnancy and childbirth, according to the CDC. Developing a prenatal care plan with your doctor can minimize the risks to your newborns.

Once you’ve been diagnosed with epilepsy, the best way to prevent seizures and reduce their frequency is to stick with the treatment prescribed by your doctor. If you feel your treatment isn’t working, and seizures are affecting your quality of life, talk to your doctor about other options. Do not stop medications without guidance from your doctor as quitting “cold turkey” can not only cause an increased risk of seizures but also serious withdrawal symptoms.

A product that can help adults and children age 6 and older is the Embrace2, a sort of smartwatch for epilepsy that senses electrodermal activity — variations of the electrical conductance of the skin in response to sweating — and physical motion that may indicate a seizure. The device can be programmed to send an alert to a caregiver via smartphone when it senses signs of a likely seizure, so the wearer is not alone when a seizure happens.

Complications of Epilepsy

Most people with epilepsy can live long, productive lives, provided they’re diagnosed early and are treated effectively.

But the condition may cause fatal complications.

For example, people who continue to experience seizures are at increased risk of sudden unexpected death in epilepsy (SUDEP), even if they’re otherwise healthy. Often, in cases of SUDEP, a person with epilepsy is found dead, with no apparent evidence of having had a seizure.

In one in three cases of SUDEP, there are signs of a recent seizure close to the time of death, an episode that may have caused heart or breathing problems.

More than 1 in 1,000 people with epilepsy die from SUDEP annually, making it the leading cause of death in people with uncontrolled seizures.

Another potential cause of death in people with epilepsy is status epilepticus, defined as a single seizure or multiple seizures that last for more than five minutes, causing lung, heart, or neurological complications.

Up to 30 percent of the people who experience status epilepticus die within 30 days of doing so.

Unfortunately, people with epilepsy are 5 times more likely to die by suicide than the general population. This may be due to the stress of managing the condition, or because of the social stigma surrounding the condition.

Historically, people who experienced seizures were linked with witchcraft and demonic possession, among other folk beliefs.

Epilepsy can also be isolating, for children and adults. Friends, family, colleagues, and neighbors may not understand the condition or know how to respond when you have a seizure. Also, if those with epilepsy can’t drive it can make accessing friends and family more difficult.

There have also been incidents of police arresting — and even tasering — people with epilepsy who have seizures in public, mistaking convulsions for erratic or violent behavior or as a sign of drug use.

In general, the lack of understanding and support can lead to feelings of loneliness, which is why joining a support group — either in person or online — may be a good idea.

Those with the condition are also at increased risk for accidents — burns, car accidents, drowning, falls — that occur during or immediately after a seizure. These incidents, too, can be fatal.

Research and Statistics: How Many People Have Epilepsy?

According to the CDC, about 1.2 percent of Americans have “active” epilepsy, meaning they’re being treated for the condition or have experienced seizures — an estimated 3 million adults and 470,000 children.

Researchers are studying many potential new treatments for epilepsy, as well as refinements and new applications for existing treatments.

For example, researchers continue to evaluate minimally invasive surgical techniques, such as magnetic resonance imaging guided laser ablation to remove the section of the brain affected by epilepsy.

Another surgical approach being investigated is stereotactic radiosurgery, in which gamma radiation is delivered to the specific area in the brain that’s causing seizures.

 A systematic review from 2017 concluded that radiosurgery is an efficacious treatment to control seizures in mesial temporal lobe epilepsy.

In a study of mice from 2018, an electronic device implanted in the brain was shown to detect and stop seizures by releasing a tailored dose of a drug directly onto the neurons that are firing and causing the seizure.

Researchers are also experimenting with external nerve stimulation devices to reduce the frequency of seizures. One approach, called external trigeminal nerve stimulation, involves placing electrodes on the skin, over the trigeminal nerve, which is responsible for sensation in the face as well as such motor activities as chewing. In a study from 2020, 50 percent of the participants who used an external trigeminal nerve stimulation for at least eight hours a day, most of them during sleep, had a reduction in seizure frequency.

Another approach to external nerve stimulation is noninvasive vagus nerve stimulation, also known as transcutaneous vagus nerve stimulation. Some small studies have shown it to reduce seizure frequency in some people with epilepsy, according to a 2019 report.

Black and Hispanic Americans and Epilepsy

Black American adults are slightly less likely to have epilepsy than white adults, according to the CDC.

The prevalence of epilepsy among Black adults is 1.8 percent, compared with 1.9 percent for white adults, the CDC says. But Black adults are slightly more likely to have active epilepsy than white adults.

Roughly 1 percent of Hispanic American adults have epilepsy, the CDC notes. Just over half of them have active epilepsy, the agency says.

Although there aren’t major racial disparities in the numbers of those living with epilepsy in the United States, research suggests there are differences in how racial and ethnic minorities are treated for the condition compared with their white counterparts.

Studies have found that Black Americans and Hispanic Americans are less likely to receive state-of-the-art diagnostic approaches, be prescribed anti-epileptic drugs, and undergo surgery to control seizures than white people with the condition. This could be due to unconscious bias by healthcare workers or Black and Hispanic Americans being more likely to lack health insurance than their white counterparts, making such care more challenging to pay for.

Related Conditions

Epilepsy may increase a child’s risk for a mood disorder, such as depression, or a learning disorder, such as attention deficit hyperactivity disorder (ADHD), according to the Epilepsy Foundation.

Children with epilepsy may also experience more headaches, including headache caused by migraine.

Individual risk for these related conditions — or comorbidities — varies, and depends on a number of factors, including how often the child has seizures, how much (and which) medication the child is taking, and the child’s age when seizures started.

Depression is thought to be the most common comorbidity with epilepsy, as it affects about 1 in 4 children with the condition, according to the Epilepsy Foundation. Depression is a serious condition, and it can lead to thoughts of suicide.

Depression is treatable, either through cognitive behavioral therapy, medication, or the two in combination.

In addition to depression, people with epilepsy are more likely to have anxiety disorder and bipolar disorder, research suggests. Although the links between bipolar disorder and epilepsy remain unclear, it’s likely that worries over seizures may contribute to feelings of anxiety.

If you or your child is experiencing anxiety, talk to your doctor.

As many as one-third of all children with epilepsy show the signs or symptoms of ADHD, the Epilepsy Foundation says. Most children with epilepsy and ADHD have difficulty paying attention or focusing, rather than being hyperactive.

Resources We Love

From patient advocacy organizations to informational sites to social networks, there’s help and support out there for individuals with epilepsy and their families and caregivers.

Epilepsy Foundation

The Epilepsy Foundation has comprehensive information about epilepsy and about living with epilepsy, including finding an epilepsy specialist.

MyEpilepsyTeam

Ask questions about epilepsy or just get to know others living with it on this online social network.

Mayo Clinic

For understandable information on epilepsy, the Mayo Clinic website is a great place to start.

National Institute of Neurological Disorders and Stroke (NINDS)

The NINDS “Hope Through Research” page features in-depth information about epilepsy as well as updates on NINDS-supported research on epilepsy and its treatment.

Centers for Disease Control and Prevention

The CDC provides basic information about epilepsy as well as links to the Managing Epilepsy Well network and to CDC programs focused on epilepsy.

Citizens United for Research in Epilepsy (CURE)

CURE raises money and awards grants to fund epilepsy research.

KidsHealth

KidsHealth from Nemours has epilepsy information geared toward kids, as well as separate articles for teens, and parents, in Spanish as well as English.

Additional reporting by Brian P. Dunleavy.

Editorial Sources and Fact-Checking

Everyday Health follows strict sourcing guidelines to ensure the accuracy of its content, outlined in our editorial policy. We use only trustworthy sources, including peer-reviewed studies, board-certified medical experts, patients with lived experience, and information from top institutions.

Sources

  1. Epilepsy and Seizures. National Institute of Neurological Disorders and Stroke.
  2. Epilepsy Data and Statistics. Centers for Disease Control and Prevention.
  3. Generalized Seizures. Johns Hopkins Medicine.
  4. Focal Epilepsy. Johns Hopkins Medicine.
  5. Focal Seizures. Epilepsy Action.
  6. Types of Epilepsy and Seizure Disorders in Children. NYU Langone Health.
  7. Types of Seizures: Unknown Onset Seizures. Epilepsy Foundation of New England.
  8. Epilepsy Syndromes. Epilepsy Foundation.
  9. Childhood Absence Epilepsy. Epilepsy Foundation.
  10. Juvenile Absence Epilepsy. Epilepsy Foundation.
  11. Juvenile Myoclonic Epilepsy. Epilepsy Foundation.
  12. Childhood Epilepsy With Centrotemporal Spikes. International League Against Epilepsy.
  13. Reflex Epilepsies. Epilepsy Foundation.
  14. Sleep-Related Hypermotor Epilepsy (SHE). Epilepsy Foundation.
  15. Temporal Lobe Epilepsy (TLE). Epilepsy Foundation.
  16. Frontal Lobe Seizures: Symptoms and Causes. Mayo Clinic.
  17. Neocortical Epilepsy. Columbia University Irving Medical Center.
  18. Hypothalamic Hamartoma. Epilepsy Foundation.
  19. Causes of Epilepsy. Epilepsy Foundation.
  20. Epilepsies by Etiology. International League Against Epilepsy.
  21. Epilepsy: Diagnosis and Treatment. Mayo Clinic.
  22. Potential Years Lost and Life Expectancy in Adults With Newly Diagnosed Epilepsy. Epilepsia.
  23. Will You Always Have Seizures? Epilepsy Foundation.
  24. Two-Year Remission and Subsequent Relapse in Children With Newly Diagnosed Epilepsy. Epilepsia.
  25. Emerging Use of Epidiolex (Cannabidiol) in Epilepsy. The Journal of Pediatric Pharmacology and Therapeutics.
  26. Vagus Nerve Stimulation (VNS) Therapy. Epilepsy Foundation.
  27. Deep Brain Stimulation. Epilepsy Foundation.
  28. Responsive Neurostimulation (RNS). Epilepsy Foundation.
  29. What Is Responsive Neurostimulation? Epilepsy Foundation.
  30. Acupuncture for Refractory Epilepsy: Role of Thalamus. Evidence-Based Complementary and Alternative Medicine.
  31. Effects of Vitamin E on Seizure Frequency, Electroencephalogram Findings, and Oxidative Stress Status of Refractory Epileptic Patients. Advanced Biomedical Research.
  32. The Effects of Herbal Medicine on Epilepsy. Oncotarget.
  33. Preventing Epilepsy. Centers for Disease Control and Prevention.
  34. Stereotactic Laser Ablation for Temporal Lobe Epilepsy (SLATE). ClinicalTrials.gov.
  35. Stereotactic Radiosurgery for Treatment of Epilepsy. JAMA Neurology.
  36. Radiosurgery for Epilepsy: Systematic Review and International Stereotactic Radiosurgery Society (ISRS) Practice Guideline. Epilepsy Research.
  37. Electrophoretic Drug Delivery for Seizure Control. Science Advances.
  38. External Trigeminal Nerve Stimulation for Drug Resistant Epilepsy: A Randomized Controlled Trial. Brain Stimulation.
  39. The Present and Future of Vagus Nerve Stimulation. Journal of Korean Neurological Society.
  40. QuickStats: Age-Adjusted Percentages of Adults Aged =18 Years Who Have Epilepsy, by Epilepsy Status and Race/Ethnicity — National Health Interview Survey, United States, 2010 and 2013 Combined. Centers for Disease Control and Prevention.
  41. Racial/Ethnic Disparities in the Treatment of Epilepsy: What Do We Know? What Do We Need to Know? Epilepsy & Behavior.

Resources

  • Mehvari J, Motlagh FG, Najafi M, et al. Effects of Vitamin E on Seizure Frequency, Electroencephalogram Findings, and Oxidative Stress Status of Refractory Epileptic Patients. Advanced Biomedical Research. March 16, 2016.
  • Liu W, Ge T, Pan Z, et al. The Effects of Herbal Medicine on Epilepsy. Oncotarget. July 18, 2017.
  • Ketogenic Diet. Epilepsy Foundation. October 25, 2017.
  • Preventing Epilepsy. Centers for Disease Control and Prevention. October 26, 2022.
  • Stereotactic Laser Ablation for Temporal Lobe Epilepsy (SLATE). ClinicalTrials.gov. July 28, 2022.
  • Quigg M, Barbaro NM. Stereotactic Radiosurgery for Treatment of Epilepsy. JAMA NeurologyFebruary 2008.
  • McGonigal A, Sahgal A, De Salles A, et al. Radiosurgery for Epilepsy: Systematic Review and International Stereotactic Radiosurgery Society (ISRS) Practice Guideline. Epilepsy Research. November 2017.
  • Proctor CM, Slézia A, Kaszas A, et al. Electrophoretic Drug Delivery for Seizure Control. Science Advances. August 29, 2018.
  • Gil-López F, Boget T, Manzanares I, et al. External Trigeminal Nerve Stimulation for Drug Resistant Epilepsy: A Randomized Controlled Trial. Brain Stimulation. September–October 2020.
  • Yang J, Phi JH. The Present and Future of Vagus Nerve Stimulation. Journal of Korean Neurosurgical Society. May 2019.
  • QuickStats: Age-Adjusted Percentages of Adults Aged =18 Years Who Have Epilepsy, by Epilepsy Status and Race/Ethnicity — National Health Interview Survey, United States, 2010 and 2013 Combined. Centers for Disease Control and Prevention. June 17, 2016.
  • Szaflarski M, Szaflarski JP, Privitera MD, et al. Racial/Ethnic Disparities in the Treatment of Epilepsy: What Do We Know? What Do We Need to Know? Epilepsy & Behavior. September 2006.
  • Related Conditions. Epilepsy Foundation. March 19, 2014.
  • Epilepsy Syndromes. Epilepsy Foundation. September 3, 2013.
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