A petit mal seizure is a brief, sudden interruption of awareness caused by abnormal electrical activity in the brain. The medical term for this type of seizure is an absence seizure. During one, a person typically stops what they are doing and stares blankly for a few seconds, then continues as if nothing happened. Treatment usually involves anti-seizure medication, and many people respond well to it.
What Is A Petit Mal Seizure?
A petit mal seizure is an older name for what doctors now call an absence seizure. The word “petit” means small in French, and that captures the outward appearance. These seizures are short and often easy to miss.
Absence seizures are a type of generalized seizure. That means the abnormal electrical activity involves both sides of the brain at once, rather than starting in one small area. This is different from focal seizures, which begin in one region and may or may not spread.
These seizures are most common in children between about 4 and 14 years old. They can happen in adults, but that is far less common. Many children who have absence seizures also have a related condition called childhood absence epilepsy, though not all do.
One detail that surprises many people: a child can have dozens or even hundreds of these seizures in a single day and no one notices. Each one lasts only seconds. From the outside, it can look like the child is simply daydreaming.
What Are The Symptoms Of A Petit Mal Seizure?
The main symptom is a sudden stop in activity with a blank stare. The person is briefly unaware of what is happening around them.
Common signs during an absence seizure include:
- Staring into space with no expression
- Stopping mid-sentence or mid-movement
- Not responding when spoken to
- Fluttering eyelids or rapid blinking
- Small lip smacking or chewing movements
- Brief hand movements, like picking at clothing
After it ends, the person usually returns to what they were doing right away. There is often no confusion afterward, which is one thing that sets absence seizures apart from other seizure types. Many people do not realize anything happened.
Some absence seizures come with automatic movements, called automatisms. These are small, repeated actions like lip smacking or hand rubbing. They can be mistaken for normal fidgeting.
It helps to know what absence seizures are not. They are not the same as focal aware seizures, where a person stays conscious. They are also not the convulsive movements seen in tonic-clonic seizures.
How Are Petit Mal Seizures Different From Daydreaming?
Daydreaming and absence seizures can look almost identical from the outside, but they work very differently in the brain. Daydreaming is a normal state of mind. A person can be snapped out of it by their name or a touch. An absence seizure cannot be interrupted that way.
During a true absence seizure, the person is not aware and cannot respond. Calling their name or tapping them does not bring them back. The seizure simply runs its short course and ends on its own.
Another difference is frequency and pattern. Daydreaming tends to happen when a person is bored or tired. Absence seizures can happen anytime, including during active play or conversation, and they often cluster.
This is why absence seizures are so often missed. A teacher may think a child is not paying attention. A parent may think a child is ignoring them. In many cases, it takes a seizure that is noticed, or a pattern that becomes clear, before anyone suspects something medical is going on.
What Causes A Petit Mal Seizure?
Absence seizures happen because of abnormal electrical activity in the brain. Specifically, they involve a pattern of synchronized firing between parts of the brain that communicate through the thalamus and the cortex.
In many cases, genetics play a role. Some forms of absence epilepsy run in families, and researchers have identified certain gene changes linked to them. That said, most children who have absence seizures do not have a family history of them.
For most people, there is no single identifiable cause. The seizures are not caused by stress, diet, or anything a parent did. They are not a sign of poor parenting or a child’s behavior problem.
In some cases, absence seizures are linked to other conditions or to structural differences in the brain. A doctor may order tests to look for these, especially if the seizures start in adulthood or come with other symptoms.
How Is A Petit Mal Seizure Diagnosed?
Diagnosis usually starts with a detailed description of what the seizures look like. Because the person having them often does not remember them, input from family members, teachers, or others who have seen them is very valuable.
The most useful test is often an electroencephalogram, or EEG. This records the brain’s electrical activity. Many people with absence seizures show a specific pattern on EEG, even between seizures, which helps confirm the diagnosis.
Because the seizures are so brief, a standard EEG may not catch one. Doctors sometimes use a longer recording, or a test that involves rapid breathing or flashing lights, to bring on the brain pattern they are looking for.
Imaging tests like MRI may be used to rule out other causes. Blood tests can check for other conditions that might explain the symptoms. Putting the pieces together takes time, and it is normal for diagnosis to take more than one visit.
How Are Petit Mal Seizures Treated?
Anti-seizure medications are the main treatment. Several medications are used for absence seizures, and the choice depends on the person’s age, seizure type, and other health factors.
Two medications are commonly used as first-line treatment for absence seizures. Other medications may be added or substituted if the first one does not control the seizures. Some medications used for other seizure types can actually make absence seizures worse, so getting the right diagnosis matters.
Response to treatment varies. Some people become seizure-free on medication. Others continue to have seizures and need adjustments over time. It often takes some trial and error to find what works.
For children whose seizures do not respond to medication, a doctor may consider other options. These can include dietary approaches or, in some cases, surgery. These decisions are made case by case with a specialist.
An important point about medication: it should not be stopped suddenly. Stopping anti-seizure medication abruptly can trigger more seizures or more severe ones. Any change should be made with a doctor’s guidance.
What Is The Outlook For Someone With Absence Seizures?
Many children with absence seizures outgrow them. For a large share, the seizures stop by the late teen years. Others continue to have them into adulthood, and some develop other seizure types.
The outlook depends on several things. These include the specific type of epilepsy, how well medications work, and whether there are other neurological conditions. A doctor can give a clearer picture based on the individual case.
Absence seizures themselves are generally not dangerous in the way that convulsive seizures can be. The main risks come from what a person is doing when one happens. Someone swimming, driving, or crossing a street during a seizure could be in real danger.
That is why safety guidance matters. Depending on seizure frequency and control, a doctor may advise limits on certain activities. These recommendations are individual and should come from a clinician who knows the case.
What Should You Do If You Think Someone Is Having One?
If you see someone having a possible absence seizure, stay calm and stay with them. Do not try to stop the seizure or hold the person still.
Gently guide them away from anything dangerous, like a hot stove or the edge of a stairway. Speak calmly and simply. The seizure will usually end within seconds.
Afterward, note what you saw. How long it lasted, what the person was doing, and any movements you noticed are all useful details for a doctor. If seizures are happening often or are new, that is a reason to see a medical professional.
Call for emergency help if a seizure lasts longer than a few minutes, if another seizure follows quickly, or if the person is injured or has trouble breathing. Absence seizures are typically brief, so a long seizure or a cluster is a different situation that needs urgent attention.
Frequently Asked Questions
What does a petit mal seizure look like?
It looks like a sudden pause with a blank stare, often lasting just a few seconds. The person may blink rapidly or make small lip or hand movements, then resume what they were doing.
Are petit mal seizures dangerous?
The seizures themselves are usually brief and not directly harmful. The main danger comes from the activity a person is doing when one happens, such as swimming or driving.
Can you outgrow petit mal seizures?
Many children with absence seizures stop having them by their late teen years. Others continue to have them into adulthood, so the outlook varies from person to person.
How are petit mal seizures treated?
Anti-seizure medications are the main treatment, and several options are used. The right choice depends on the person’s age, seizure pattern, and other health factors.

