Seizures are abnormal movements or behaviour due to unusual electrical activity in the brain, and are a symptom of epilepsy. However, not everyone who has seizures has epilepsy.

There are a group or related disorders that have a tendency for recurrent seizures, such as:

• Non-epileptic seizures: they are not accompanied by abnormal electrical activity in the brain and could be the result of psychological issues or stress.
• Provoked seizures: they are single seizures that may occur as the result of trauma, low blood sugar, low sodium, high fever, or alcohol or drug abuse.
• Seizure disorder: a general term given to describe any condition that may have seizures as a symptom.