Seizures don’t all look the same. The full-body convulsions most people picture are just one type. Many seizures are far subtler: a blank stare lasting a few seconds, repetitive lip smacking, or a sudden collapse with no shaking at all. What you see depends entirely on which part of the brain is affected and how much of the brain is involved.
Tonic-Clonic Seizures: The Type Most People Recognize
This is the classic seizure you’ve likely seen in movies or first-aid training. It happens in two distinct phases, and knowing the progression helps you recognize what’s happening in real time.
In the tonic phase, every muscle in the body stiffens at once. The person loses consciousness and falls, often rigidly, like a tree trunk. Their jaw clenches, their arms may flex or extend, and they may let out a cry or groan as air is forced past tightened vocal cords. This is not a scream of pain; the person is unconscious and unaware.
The clonic phase follows within seconds. The stiffness gives way to rhythmic jerking of the arms, legs, and sometimes the face. The jerking starts fast and gradually slows before stopping. The person may bite their tongue, drool, or lose bladder control. The whole event typically lasts one to three minutes. If it goes beyond five minutes, it’s a medical emergency requiring a 911 call.
Absence Seizures: Easy to Miss
Absence seizures look nothing like convulsions. The person suddenly stops what they’re doing and stares blankly, as if they’ve momentarily “checked out.” Their eyes may roll upward and their eyelids may flutter. Some people smack their lips, make chewing motions, or rub their fingers together. The whole episode usually lasts less than 10 to 20 seconds, and then the person picks up right where they left off, often with no idea anything happened.
These seizures are most common in children and are frequently mistaken for daydreaming or not paying attention. A key difference: you can snap a daydreamer out of it by calling their name. During an absence seizure, the person won’t respond at all until it’s over.
Focal Seizures With Altered Awareness
These seizures start in one area of the brain and affect consciousness without necessarily causing convulsions. The person appears awake but is clearly not “there.” They may stare with a glazed expression and perform strange, repetitive movements called automatisms: picking at their clothing, rubbing their hands together, smacking their lips, or fumbling with nearby objects. Some people wander aimlessly or make chewing motions.
When the seizure originates in the frontal lobe, the movements can look even stranger. The person might pedal their legs as if riding a bicycle, thrust their pelvis, or make other complex movements that can seem purposeful but aren’t. Some people do things during these seizures that are dangerous or embarrassing, like walking into traffic or removing their clothes. They have no control over these actions and typically won’t remember them afterward.
Focal Seizures Without Lost Awareness
Some seizures are invisible to bystanders. In a focal aware seizure, the person stays fully conscious but experiences strange sensations: a sudden metallic taste, an unusual smell, a wave of intense fear or déjà vu, tingling in one hand, or visual disturbances. These episodes sometimes serve as a warning that a larger seizure is about to follow, and people with epilepsy often learn to recognize them as a signal to get somewhere safe.
From the outside, you might notice the person pause, look uneasy, or mention something feels “off,” but there’s no obvious physical sign that a seizure is occurring.
Drop Attacks and Sudden Jerks
Atonic seizures are among the most dramatic-looking, despite being extremely brief. The person’s muscles suddenly go completely limp. If they’re standing, they crumple to the ground like a rag doll. If sitting, their head drops forward or their upper body slumps over. The entire event typically lasts less than 15 seconds. The biggest danger isn’t the seizure itself but the injuries from falling, particularly head and face injuries.
Myoclonic seizures are the opposite in a way. Instead of losing muscle tone, the person experiences sudden, brief muscle jerks, almost like being startled. These can affect the whole body or just one arm or leg. Each jerk lasts only a second or two, though they can occur in clusters.
What Happens After a Seizure
The period immediately following a seizure, known as the postictal state, is often as distinctive as the seizure itself. After a tonic-clonic seizure especially, the person may be deeply confused, exhausted, or unable to speak clearly. Headaches, muscle soreness, and memory loss are common. Some people feel depressed, anxious, or agitated. Others experience nausea, coughing, or a temporary spike in body temperature.
This recovery period can last anywhere from a few minutes to several hours depending on the severity of the seizure. After more severe seizures, some people experience hallucinations or delirium. It’s normal for the person not to remember the seizure or the minutes leading up to it.
How to Tell a Seizure From Fainting
Fainting and seizures can look similar at first glance, since both involve collapsing and sometimes brief muscle twitching. But several physical differences help distinguish them. During a seizure, bystanders are far more likely to observe sustained limb jerking, the head turning to one side, unusual body posturing, and a bluish skin color. The person is typically unresponsive throughout the event and confused afterward.
Fainting, by contrast, usually involves going pale (not blue), going limp rather than stiff, and recovering quickly once the person is lying down. Any twitching during a faint tends to be brief and irregular rather than the sustained, rhythmic jerking of a tonic-clonic seizure. Muscle pain and headache after the event also point more strongly toward a seizure than a faint. If the person bit their tongue, especially the side of it, that’s one of the most reliable indicators that a seizure occurred.