Seizures are the basic indicator of epilepsy. They vary widely:
Staring straight ahead, repetitive swallowing, and lapsing into complete immobility for a few seconds characterize absence (petit mal) seizures, which can recur many times in a day.
Tonic/clonic (grand mal) seizures, which usually last several minutes, typically begin with a loss of consciousness and a fall, followed by rigidity, then jerking motions and incontinence of urine. After the seizure ends, there is usually a period of confusion and deep sleep.
Repetitive lip smacking, aimless fiddling movements, and a sense of detachment from surroundings may indicate temporal lobe seizures. They may be preceded by a vague feeling of abdominal discomfort, visual/sensory hallucination, and distorted perceptions such as deja-vu.
Motor or Jacksonian seizures start with localized rhythmic twitching of muscles in a hand, a foot, or the face, which may spread to the whole body. Such seizures are often followed by a period of weakness or paralysis.