A petit mal seizure, now called an absence seizure, feels like nothing at all to the person having one. That’s what makes it so disorienting. You don’t feel pain, you don’t feel a jolt, and you don’t fall down. Instead, consciousness simply switches off for a few seconds and then switches back on, leaving a small gap in your experience of time. Most episodes last between 3 and 15 seconds, though some stretch to 30 seconds.
The experience is less about what you feel during the seizure and more about what you notice afterward: a sense that you “missed” something, a conversation that moved ahead without you, or a moment where everyone around you looks concerned and you’re not sure why.
What You Experience From the Inside
Unlike other types of seizures, petit mal seizures don’t come with an aura or warning signal. There’s no rising feeling in the stomach, no strange taste or smell. One moment you’re present, and the next moment you’re present again, but a chunk of time has vanished. If you were mid-sentence, you might trail off and then resume talking as if nothing happened. If you were walking, you might stop in place and then continue once the seizure ends.
Because the episodes are so brief, many people don’t realize they’re happening at all, especially children. A child might just seem like they’re zoning out in class. The key difference between a seizure and ordinary daydreaming is that during an absence seizure, you genuinely cannot respond. If someone snaps their fingers in front of your face, calls your name, or taps your shoulder, you won’t react. A daydreaming child will. That unresponsiveness, even for just a few seconds, is the hallmark sign.
What Others See
To an observer, a petit mal seizure looks like a sudden blank stare. The person stops whatever they’re doing, mid-word or mid-step, and appears frozen. Their eyes may look glassy or unfocused. After about 10 to 15 seconds, they snap out of it and carry on as though nothing happened, with no confusion or grogginess afterward.
Some seizures come with subtle physical movements that happen automatically, without the person’s awareness or control:
- Eyelid fluttering
- Lip smacking or chewing motions
- Finger rubbing
- Small repetitive hand movements
- Slight head nodding
These movements are called automatisms. The person performing them has no memory of doing so. There’s no falling, no full-body shaking, and no loss of muscle tone. That’s why these seizures can go unnoticed for months or even years, particularly in school-age children who may simply be labeled inattentive.
What’s Happening in the Brain
During a petit mal seizure, neurons across both sides of the brain begin firing in an abnormally synchronized rhythm. This starts in the outer layer of the brain (the cortex) and quickly loops through a circuit that connects the cortex to the thalamus, a deep brain structure that acts as a relay station for sensory information. The thalamus normally filters what reaches your conscious awareness. When this circuit gets locked into a repetitive electrical loop, the thalamus essentially stops relaying new information, and consciousness blanks out.
This abnormal rhythm shows up on an EEG (a test that records electrical activity in the brain) as a distinctive spike-and-wave pattern repeating about 3 times per second. That specific pattern is what confirms a diagnosis. Faster patterns, around 3 to 5.5 cycles per second, are more common when seizures begin in adolescence rather than childhood.
Triggers and Frequency
Some people have just a handful of absence seizures per week. Others have dozens or even hundreds per day, each one brief enough that it barely registers. When seizures happen this frequently, the cumulative effect on attention and learning can be significant, even though each individual episode lasts only seconds.
Known triggers include sleep deprivation, stress, and hyperventilation (rapid, deep breathing). In fact, doctors sometimes ask patients to breathe quickly and deeply during an EEG specifically because it’s so effective at provoking an absence seizure, which helps confirm the diagnosis. Some individuals are also sensitive to flickering or flashing lights.
How It Affects Daily Life
For children, the biggest impact is usually at school. A child having 20 or 30 brief seizures a day will miss fragments of lessons, instructions, and conversations throughout the day. Teachers and parents often notice declining grades or apparent inattentiveness before anyone suspects seizures. Socially, the blank stares can be confusing for peers, and children may feel embarrassed once they understand what’s happening.
For teens and adults, driving is a major concern. Most jurisdictions require a seizure-free period of at least three months before someone with epilepsy can drive, though the exact requirement varies. The American Academy of Neurology, American Epilepsy Society, and Epilepsy Foundation recommend an individualized risk assessment rather than a blanket rule. Driving should also be paused when tapering off or stopping seizure medication. Even brief lapses of awareness at the wheel can be dangerous, so this restriction applies to absence seizures just as it does to more dramatic seizure types.
Daydreaming or Seizure: How to Tell
If you’re a parent wondering whether your child is just zoning out, one simple test is to try getting their attention during an episode. Call their name, clap, or wave a hand in front of their face. A daydreaming child will startle, blink, or look at you. A child having an absence seizure will not respond at all until the episode ends on its own. The seizure also ends abruptly, with the child immediately returning to normal activity, not the slow “coming back” you see when someone was lost in thought.
Other clues: the staring spells happen multiple times a day, they last roughly the same duration each time, and they may involve those subtle repetitive movements like lip smacking or eyelid fluttering. If this pattern is consistent, it’s worth having a pediatric neurologist evaluate with an EEG.
Who Gets Them and How Long They Last
Absence seizures most commonly begin between ages 4 and 14, with a peak around ages 6 to 7. They’re slightly more common in girls. The condition is called childhood absence epilepsy when it fits the typical age and pattern.
Many parents are told their child will “grow out of it,” and that’s true for a majority, but the numbers are less reassuring than people sometimes expect. A long-term study following children for an average of 14 years found that 65% achieved full remission, meaning they became seizure-free and no longer needed medication. The average age at remission was 12. However, about 15% of children with absence seizures go on to develop a different type of epilepsy in adolescence, one that includes full-body convulsive seizures. Children who didn’t achieve remission within 10 years of their first seizure were unlikely to do so later.
The remaining 35% who don’t fully outgrow their seizures may need ongoing medication management into adulthood. Treatment is generally effective at reducing or eliminating episodes, and most people with absence epilepsy live without major limitations once their seizures are well controlled.