Tonic seizures are more likely to happen when a person is asleep.
During a tonic seizure, a person’s muscles will stiffen. This can happen on one side or both sides of the body, depending on the part of the brain affected.
If they are not already lying down, they might fall down.
Their lips might turn blue and appear to stop breathing. This is because their chest muscles stiffen.
Tonic seizures are short usually lasting less than 60 seconds. Some people tend to have clusters of tonic seizures, where they have several seizures in a short space of time.
The person’s neck will extend, their eyes open wide and roll upwards. Their arms may raise upwards and the legs might stretch or contract.
People usually recover fast from tonic seizures. Some people might feel groggy for a few minutes. This is more likely if they’ve had a cluster of seizures.
If a tonic seizure stops by itself and the person isn’t injured, they will not usually require medical attention.
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