A seizure is a sudden, uncontrolled electrical disturbance in the brain that can cause changes in behavior, movements, feelings, or consciousness. Seizures can vary in intensity and duration, and they may affect different parts of the brain. Common types include tonic-clonic seizures, which involve muscle stiffening and jerking movements, and absence seizures, which cause brief lapses in awareness. Seizures can be triggered by various factors, including epilepsy, head injuries, infections, or high fever. While some individuals may experience only one seizure in their lifetime, others may have recurrent episodes. Treatment options often include medications and lifestyle changes to help manage and reduce the frequency of seizures.