A seizure is a sudden burst of abnormal electrical activity in the brain. This "electrical storm" can cause temporary changes in the person's movements, awareness and sensations.

Having a seizure doesn't necessarily mean that a child has epilepsy. For example, seizures triggered by a fever or head injury aren't considered epilepsy.

Several types of seizures can affect children, with symptoms that range from mild to severe. We define these types by where in the brain the seizure starts and the symptoms it causes.