The sudden onset of convulsions while sleeping is usually caused by a range of factors such as myokymia, micronutrient deficiencies in the body, epilepsy, and cerebellar lesions. Myoclonus is a rapid involuntary muscle twitching, which is very fast and therefore often presents itself as an electric shock-like movement, and can occur suddenly in the middle of sleep. In some people, a deficiency in trace elements, such as a decrease in calcium in the blood, can lead to neuromuscular hyperexcitability and spasms that appear as twitches. Magnesium deficiencies can also lead to such convulsions. People with a history of epilepsy who experience convulsions in their sleep may be suffering from seizures. In addition, convulsions during sleep can also be caused by cerebellar lesions, but cerebellar lesions can cause other symptoms besides convulsions, such as slurred speech and nystagmus. Therefore, if the number of sudden convulsions in sleep is not frequent, then most of them are caused by physiological muscle twitching, but if the number is more frequent and accompanied by other symptoms, then it may be caused by physical lesions, and it is necessary to go to the hospital to do a detailed examination to be able to confirm the diagnosis.