Epilepsy is a long-lasting brain condition that causes people to have repeated seizures.
A seizure is a sudden change in electrical activity in the brain. It can cause different symptoms, from someone becoming unconscious and shaking, to someone behaving unusually for a short time (see types of epilepsy and seizures for more).
This is a companion discussion topic for the original article at https://patient.info/brain-nerves/epilepsy-and-seizures