Seizures during sleep may be caused by sleep-type epilepsy, or they may be caused by infectious diseases, improper medication, and so on. 1. Sleep-type epilepsy: a type of epilepsy that occurs during sleep, characterized by irregular seizures without warning. It is mostly caused by heredity, brain injury and other factors. Often, seizures occur during sleep or when they are about to wake up, manifested by sudden convulsions, generalized spasms, panic, and disorganized movements of the hands and feet during sleep. 2. Infectious diseases: when suffering from upper respiratory tract infections, lobar pneumonia, meningitis and other infectious diseases, seizures may be secondary, and some patients may have seizures during sleep. 3. Improper medication: epilepsy patients should take anti-epileptic drugs regularly as prescribed by the doctor, and should not reduce the dosage or stop taking the drugs on their own, otherwise it may lead to frequent seizures, and some of them may have seizures in their sleep. If the occurrence of epilepsy in the sleep, it is recommended to consult a doctor in a timely manner to clarify the cause of the disease and then targeted treatment.