Nocturnal seizures are a form of epilepsy caused by abnormal electrical activity that can be caused by lack of sleep, head injuries, alcohol, stress, hormones, brain infections, and recreational drug use.
Most people suffering from nocturnal seizures have epileptic seizures during the day. If the cause of the seizures can be identified, it is possible to control the nocturnal seizure.
Symptoms are difficult since mostly they manifest as movements during sleep and usually last under 30 seconds. Other clues may be wetting the bed and waking with a bloody mouth from biting the tongue.
If nocturnal seizures are suspected, consult a neurologist. An overnight sleep study at a local clinic with video monitoring can be helpful. See the example of a nocturnal seizure during a sleep study above.