What Is the Postictal Phase of a Seizure?

What the symptoms following a seizure can tell us

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An EEG test is performed on an epilepsy patient.
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The postictal phase refers to the period of time immediately following a seizure. The postictal phase can last for seconds, minutes, hours, and sometimes even days. It is commonly thought of as the time during which the brain recovers from a seizure.

The other phases include the prodromal phase (when emotional signs appear), the aural phase (characterized by altered sensations), and the ictal phase (the actual seizure).

Symptoms of the Postictal Phase

The duration of a postictal phase can vary, as can the symptoms. The types and severity of symptoms are largely dependant on the part of the brain involved and how long the seizure lasted.

Postictal symptoms can effect changes in behavior, thinking, mood, and motor function, including:

  • Fatigue
  • Headache
  • Nausea
  • Sleepiness
  • Memory loss
  • Mental confusion or fogginess
  • Feeling thirsty
  • Weakness in part of all of the body
  • A strong urge to urinate
  • Loss of bladder and/or bowel control
  • Difficulty walking
  • Speech or writing impairment

As a result of a seizure, a person may experience injuries ranging from head traumas and bone fractures to bruises and bitten tongues. There may also be an emotional component characterized by feelings of embarrassment, anxiety, frustration, sadness, agitation, and confusion.

In some cases, people experience more extreme mental symptoms, including delirium and psychosis.

Postictal migraines are a common complaint among people with epilepsy. One possible explanation for this is the cerebral edema (brain swelling) that can result from a seizure, causing increased intracranial pressure and pain. In some cases, a person may only be aware they've had a seizure when a postictal migraine appears.

On the flip side, some people have postictal bliss, described as an excessively happy feeling, after a seizure.

Significance of Postictal Symptoms

Postictal symptoms can sometimes help doctors determine the focus of the seizure (where in the brain the seizure activity started).

Some examples of this include:

  • Postictal dysphasia: Characterized by difficulty speaking, this symptoms suggests the seizure originated in your dominant hemisphere. (In a right-handed person, the right half.)
  • Postictal paralysis: Temporary weakness of a hand or limb is associated with the side of the brain opposing the seizure focus. (In a right-handed person, the left half.)
  • Postictal automatisms: Repetitive actions such as lip smacking or nose rubbing are a common sign of complex partial seizures, which frequently arise in the temporal lobe.

Value of EEG in the Postictal Phase

During the postictal phase, an electroencephalogram (EEG) will usually show slowed brain activity on the side of the brain where the seizure originated.

Sometimes, though, the slower activity occurs in both the ictal and postictal phases, making it can be difficult to distinguish between the phases. In addition, the brain-wave changes on an EEG do not always correlate with a person's behavioral changes.

For those reasons, some doctors prefer to focus on describing a person's behavior in context with any EEG changes that occur during or after a seizure as opposed to labeling them ictal or postictal.

While it may seem that taking an EEG after a seizure has limited value—rather like calling the weather bureau after the storm has passed—the event leaves a trail of altered brain activity that can help doctors characterize seizures so they know better how to treat them, such as with medication or surgery.

Coping

Managing and coping with postictal symptoms starts with recognizing what the symptoms are and what is typical for that person. For instance, if your child typically has a postictal migraine, their doctor may be able to prescribe medication that you can give them right after a seizure.

If you observe postictal behavior or symptoms that are abnormal, in general or for that person, get immediate medical help. A serious brain injury, change, or complication may be involved.

Otherwise, taking care of physical needs (such as thirst), a safe and calm environment, rest, reassurance, and emotional support can all help.

Postictal Delirium

In people who experience postictal delirium, it typically goes away quickly. However, those with severe seizures may experience longer periods (a few hours to two days) that require significantly more care.

Some severely disabled people, those with mental deficits and extensive brain abnormalities, may experience delirium for up to 10 days after repetitive seizures. However, these are typically people who already require around-the-clock care.

If you or someone you care for exhibits violent or extremely agitated behavior, talk to a doctor about medications that may help prevent this. Otherwise, creating a safe environment, tending to physical needs, and providing emotional comfort are usually sufficient for getting through the delirious phase.

Postictal Psychosis

Postictal psychosis can lead to violent behaviors, and sometimes suicide attempts. These episodes are rare—in a clinical study, only two out of 1,300 people experienced them. If you suspect postictal psychosis in yourself or someone else, contact a doctor about how it can be treated and managed.

A Word From Verywell

If you're unfamiliar with a person's postictal phase, it's hard to know what to expect. If you could be in a position to care for them in this state, ask questions about what is typical.

When you are familiar with the "normal" course of things, make sure to call the doctor if you have questions or concerns, or if a particular postictal phase seems abnormal for the person.

If you need help dealing with extended or particularly difficult postictal phases, talk to the doctor about long-term strategies that may be better suited to the situation.

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