Seizures can occur at any time, in a variety of forms and at different levels of severity for each individual. They may or may not be visible to others. Convulsive seizures often are not difficult to recognize. This type of seizure, lasting from several minutes or longer, usually starts with a cry and loss of consciousness. The body becomes rigid, followed by massive jerking movements.
Breathing is shallow, then becomes louder as the person relaxes.
Seizures are followed by fatigue and confusion. Non-convulsive seizures are more difficult to spot. Seizures that begin in the teen years may be especially hard to recognize. Some behaviors may be mistaken for signs of drug or alcohol use. To prevent injury, don't hold the person down but do remove hazards in the area.