Seizures look different depending on the type, but the most recognizable signs include sudden muscle stiffening, rhythmic jerking of the arms or legs, a blank stare, loss of consciousness, and confusion afterward. Some seizures are dramatic and impossible to miss. Others are so subtle that a parent might mistake them for daydreaming. Knowing what to look for across the full range helps you recognize a seizure when it happens and respond appropriately.
Warning Signs Before a Seizure
Many people experience a warning phase called an aura in the seconds or minutes before a seizure begins. An aura is actually a small seizure itself, one that hasn’t yet spread to larger areas of the brain. Common aura experiences include a rising sensation in the stomach, a sudden wave of fear or joy, an unexplained metallic taste, or a strange smell that isn’t really there. Some people describe intense déjà vu, the overwhelming feeling that they’ve lived through the current moment before.
Not everyone gets auras, and they don’t happen before every seizure type. But when they do occur consistently, they can serve as a valuable few seconds of advance notice.
Tonic-Clonic Seizures: The Most Recognizable Type
Tonic-clonic seizures (formerly called grand mal seizures) are what most people picture when they think of a seizure. They unfold in two distinct phases.
During the tonic phase, the person may let out a groan or yell as their muscles suddenly stiffen. They lose consciousness and typically fall to the ground. This phase lasts roughly 10 to 20 seconds. It’s followed by the clonic phase, where the arms and legs begin jerking rhythmically, alternately flexing and relaxing. These convulsions usually last one to two minutes.
Other signs you might notice during a tonic-clonic seizure include drooling or foaming at the mouth, bluish skin (especially around the lips), loss of bladder or bowel control, and dilated pupils. The person will not respond to you during the episode.
Absence Seizures: Easy to Miss
Absence seizures are far more subtle and happen most often in children. The main sign is a brief, sudden blank stare, almost as if the child has zoned out. During the episode, all activity stops completely. If they were talking, they go silent mid-sentence. If they were walking, they freeze in place.
These episodes typically last only 5 to 15 seconds, and the child resumes normal activity immediately afterward with no memory of the pause. You might also notice slight eyelid fluttering, gentle head nodding, or small automatic movements like lip smacking. Because they’re so brief and quiet, absence seizures can happen dozens of times a day before anyone realizes something is wrong. Teachers sometimes notice them before parents do, flagging a child who seems to “space out” repeatedly in class.
Focal Seizures: Unusual Behaviors and Sensations
Focal seizures start in one specific area of the brain, and their signs depend heavily on which area is involved. They fall into two categories based on whether the person remains aware during the episode.
In a focal aware seizure, the person stays conscious but experiences something unusual: a sudden emotion, a strange taste or smell, tingling in one hand, or involuntary twitching on one side of the body. They can describe what’s happening but can’t stop it.
Focal impaired awareness seizures are different. The person loses awareness of their surroundings and may look confused or dazed. They often perform repetitive, purposeless movements: picking at their clothes, smacking their lips, fumbling with objects, or wandering aimlessly. They won’t be able to respond to questions or follow directions during the episode, and they typically have no memory of it afterward. These episodes usually last 30 seconds to two minutes.
Signs of Seizures in Babies
Seizures in infants can look nothing like seizures in older children or adults, which makes them especially easy to overlook. A specific type called infantile spasms typically appears between 3 and 12 months of age and involves brief, sudden movements: the baby’s body may stiffen, their arms and legs may bend forward, their back may arch, or their head may drop. You might also see repeated head nodding, eye rolling, chin twitching, or a grimacing expression.
The key pattern to watch for is clustering. These spasms happen in groups with short pauses of 5 to 10 seconds between each one, and they most often occur right after the baby wakes up. A single spasm can look like a normal startle reflex, but a series of them is a red flag. Infantile spasms require prompt evaluation because early treatment significantly affects outcomes.
What Happens After a Seizure
The recovery period after a seizure, known as the postictal state, has its own set of signs. The most common are confusion, headache, extreme fatigue, muscle soreness, and difficulty speaking. Some people experience memory loss, mood changes, anxiety, or depression in the minutes to hours following a seizure. Nausea and an abnormal heartbeat can also occur.
This recovery phase typically lasts between 5 and 30 minutes, though symptoms generally resolve within a day. After more severe seizures, the postictal state can stretch to several days and may include hallucinations or delirium. The key thing to understand is that the person may not be “back to normal” immediately after the jerking stops. Lingering confusion and exhaustion are expected, not a sign that something has gone additionally wrong.
How Seizures Differ From Fainting
Fainting and seizures can both involve falling and losing consciousness, so it’s useful to know how they look different. The biggest distinction is in recovery. A person who faints usually wakes up quickly and is alert almost immediately. A person who has had a seizure wakes up confused, disoriented, and may take minutes to hours to feel normal again.
During the episode, seizures typically involve rhythmic muscle jerking, tongue biting, and drooling. Fainting is more likely to involve going pale or turning bluish in the lips and may follow a specific trigger like standing up too quickly, prolonged standing, or coughing. Both can cause loss of bladder control, so that alone doesn’t help distinguish them. The prolonged, confused recovery period is the most reliable sign that you witnessed a seizure rather than a faint.
Non-Epileptic Events That Resemble Seizures
Some episodes that look like seizures aren’t caused by abnormal electrical activity in the brain. These are called psychogenic non-epileptic seizures (PNES), and they’re a real medical condition rooted in how the brain processes stress, trauma, or emotional overload. Certain physical features can help distinguish them from epileptic seizures: rapid side-to-side head shaking, out-of-sync limb movements (where the arms and legs don’t jerk in rhythm), pelvic thrusting, and eyes that remain closed throughout the episode. During epileptic seizures, the eyes are typically open.
PNES episodes often last longer than epileptic seizures and don’t follow the typical tonic-then-clonic sequence. They require a different treatment approach, so getting the right diagnosis matters.
When a Seizure Becomes an Emergency
Most seizures end on their own within a couple of minutes and, while frightening to witness, don’t cause lasting harm. The situation changes when a seizure lasts longer than 5 minutes, or when a person has multiple seizures without regaining consciousness between them. This is called status epilepticus, and it’s a medical emergency requiring a call to 911.
Other situations that warrant emergency help: a seizure in someone who has never had one before, a seizure that happens in water, a seizure in someone who is pregnant, or any seizure followed by difficulty breathing. If you’re with someone having a seizure, the most helpful things you can do are ease them to the ground, turn them on their side, clear away nearby objects, and time the episode. Don’t put anything in their mouth, and don’t try to hold them down.