Epilepsy is diagnosed when a person has two or more unprovoked seizures at least 24 hours apart, or when a single unprovoked seizure combines with brain activity patterns that suggest a high risk of more. You can’t diagnose epilepsy on your own. But you can learn to recognize the signs that something you’ve experienced may have been a seizure, which is the critical first step toward getting the right tests.
Up to 10% of people worldwide will have a single seizure at some point in their lives. That alone doesn’t mean epilepsy. Between 4 and 10 out of every 1,000 people have active epilepsy at any given time, so if you’re reading this because something happened that scared you, know that a one-time event has multiple possible explanations.
What Seizures Actually Feel Like
Seizures don’t always look like what you see in movies. The dramatic full-body convulsions are just one type. Many seizures are subtle enough that people don’t realize they’re having them, or they assume something else is going on.
Focal aware seizures leave you fully conscious but cause strange sensations: a sudden wave of déjà vu, an odd feeling rising in your stomach, or brief involuntary movements in one part of your body. These episodes typically last seconds to a couple of minutes. Because you stay alert through them, it’s easy to dismiss them as anxiety, a stomach issue, or just “something weird.”
Focal impaired awareness seizures affect your consciousness. You might appear dazed, smack your lips, pick at your clothes, or stare blankly. You won’t be able to respond to questions or follow directions for a few minutes, and you likely won’t remember the episode afterward. People around you may notice before you do.
Absence seizures are especially easy to miss. They cause brief staring spells, sometimes with rapid blinking or subtle chewing motions, and they’re over in seconds. In children, teachers sometimes mistake them for daydreaming. Adults may just feel like they “lost” a few seconds.
Tonic-clonic seizures are the most recognizable type. Your muscles stiffen, you lose consciousness, and your body jerks rhythmically. You may cry out, fall to the ground, or lose bladder control. These usually last a few minutes and leave you confused and exhausted afterward.
Auras: The Warning Signs Before a Seizure
Many people with focal seizures experience a warning phase called an aura in the moments before a seizure begins. An aura is technically a seizure itself, just one that stays localized in a small area of the brain before potentially spreading.
Auras can take many forms. Some people smell something that isn’t there, like burning rubber or chemicals. Others taste metal or experience a sudden emotion, most often fear, with no obvious cause. Visual auras include seeing flashing lights, colors, or shapes. Some people feel dizzy, lose their balance, or even see full hallucinations. The classic rising feeling in the stomach and intense déjà vu are among the most commonly reported. If you keep experiencing the same unusual sensation right before blanking out or feeling “off,” that pattern is worth paying close attention to.
What Happens After a Seizure
The recovery period after a seizure, called the postictal state, is itself a clue that a seizure occurred. On average, it lasts between 5 and 30 minutes, though it can stretch to a few days after severe episodes.
Common symptoms include headache, confusion, fatigue, muscle soreness, difficulty speaking, and memory loss. You may feel emotionally off afterward, experiencing depression, anxiety, agitation, or embarrassment. Physical signs like coughing, nausea, elevated body temperature, or abnormal heart rate can also occur. After more severe seizures, some people experience delirium or even brief psychosis. If you’ve ever “come to” feeling deeply confused, sore, and exhausted with no memory of what happened, that’s a pattern consistent with a postictal state.
Conditions That Mimic Seizures
Not everything that looks or feels like a seizure is one. An estimated 20 to 30% of people initially diagnosed with epilepsy actually have fainting spells (syncope) caused by drops in blood pressure or heart rhythm changes. Fainting can involve brief muscle twitching that looks like a seizure, but it’s a cardiovascular issue, not a brain one.
Functional (dissociative) seizures are episodes that closely resemble epileptic seizures but don’t involve abnormal electrical activity in the brain. They’re real events, not faking, but they require a completely different treatment approach. Seizures can also be “provoked” by a clear external cause like alcohol withdrawal, very low blood sugar, high fever, or a heart problem. Provoked seizures are not epilepsy and often don’t recur once the trigger is removed.
This is exactly why self-diagnosis doesn’t work here. The overlap between epileptic seizures and their imitators is significant, and only specific brain monitoring can tell them apart.
How Epilepsy Is Diagnosed
Diagnosis starts with a detailed description of what happened. A neurologist will ask about the event itself, what you were doing beforehand, how you felt during and after, and whether anyone witnessed it. From there, two tests form the backbone of the evaluation.
An EEG (electroencephalogram) records your brain’s electrical activity through sensors placed on your scalp. It can detect the specific brainwave patterns associated with different seizure types and help a neurologist categorize what’s happening. A normal EEG doesn’t rule out epilepsy, since seizure activity doesn’t always show up during a short recording. For harder-to-catch seizures, especially ones that happen at night, doctors may recommend extended video EEG monitoring over hours or days. This captures both brain activity and video of your body simultaneously, which is particularly useful for subtle seizures that are hard to spot by observation alone.
An MRI of the brain looks for structural abnormalities, things like scar tissue, tumors, or developmental differences, that could be causing seizures. Not everyone with epilepsy will have a visible abnormality on imaging, but when one is found, it helps guide treatment decisions.
What to Track Before Your Appointment
The single most useful thing you can do before seeing a doctor is document your episodes in detail. If someone witnessed what happened, their observations are especially valuable. Here’s what to record:
- Before the event: What were you doing? Had your mood or behavior changed in the hours or days prior? Did you have any warning sensation or aura?
- Possible triggers: Sleep deprivation, alcohol or drug use, emotional stress, flashing or bright lights, illness, missed meals, menstrual cycle timing, or fast breathing.
- Date and time: When it happened and how long it lasted.
- During the event: Were you aware of what was happening? Could you talk or understand speech? Did you notice any unusual tastes, smells, or visual changes? Were there physical signs like staring, twitching, lip-smacking, stiffening, jerking, drooling, or skin color changes? Did symptoms start on one side of the body or both?
- After the event: Could you respond to your name? Did you know where you were? Could you remember what happened? How long did confusion, fatigue, or soreness last?
If possible, ask someone nearby to record video on their phone during an episode. Video is enormously helpful for neurologists trying to distinguish between seizure types and rule out mimics.
Wearable Devices for Seizure Monitoring
Several wearable devices can now detect seizures by tracking movement patterns and other body signals. The Empatica EpiMonitor wristband is FDA-cleared in the United States and costs around $399. The NightWatch armband, designed to detect seizures during sleep, recently received both European CE-marking and FDA clearance. Other wristband sensors like the Epi-Care line are available in Europe but not yet authorized in the U.S.
These devices are monitoring tools, not diagnostic ones. They can help track seizure frequency once you already have a diagnosis, or they can catch events you might otherwise sleep through. They vary in accuracy and work best for seizures involving significant motor activity. They’re not a substitute for an EEG or neurologist evaluation, but they can add useful data to bring to your appointments.