The primary symptom of epilepsy is the occurrence of seizures, which can be classified as generalized or focal. Generalized seizures affect both sides of the brain, often causing convulsions, loss of consciousness, or confusion. Focal seizures, however, may result in unusual sensations or behaviors, depending on the area of the brain involved, and can manifest as convulsions in certain cases. Postictal state, or the recovery period following a seizure, may involve fatigue, confusion, or headache.