Tonic-clonic seizures used to be called grand mal seizures. Some people with epilepsy still use this term.
Tonic-clonic seizures are the type of seizure most people recognise.
Someone having a tonic-clonic seizure goes stiff, loses consciousness, falls to the floor and begins to jerk or convulse. They may go blue around the mouth due to irregular breathing. Sometimes they may lose control of their bladder or bowels, and bite their tongue or the inside of their mouth.
The seizure is over when the jerking has stopped, the person’s muscles have relaxed and their breathing has returned to normal.
A tonic-clonic seizure isn’t usually a medical emergency and you may not need to call an ambulance.
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