A convulsion is a sudden, uncontrolled electrical disturbance in the brain that can cause changes in behavior, movements, or consciousness. It often results in muscle contractions and can lead to shaking or jerking movements. Convulsions are commonly associated with conditions like epilepsy, but they can also occur due to fever, head injury, or other medical issues. During a convulsion, a person may lose awareness or experience confusion afterward. The duration of a convulsion can vary, typically lasting from a few seconds to a few minutes. It is important to seek medical attention if someone experiences a convulsion, especially if it is their first episode or lasts longer than five minutes.