If a baby suddenly convulses while sleeping, if it is just an occasional one, it can be observed first, but if it is a continuous and violent convulsion, the baby should be immediately sent to the hospital for treatment, during which parents should not forcefully stop the child from convulsing to avoid fractures. Sudden convulsions are considered to be related to vitamin D deficiency, high fever convulsions, epilepsy, central nervous system infections, etc. In serious cases, active treatment is required under the guidance of a doctor. 1, fright: If the baby watched a frightening movie, witnessed a parental quarrel, or was reprimanded by the parents before going to bed, it is possible that after going to sleep, there will be an occasional convulsion, which is mostly a normal physiological reaction, and if there is a case of fright suffered before going to bed If there is a case of fright before bedtime, parents should soothe and accompany the baby to sleep; 2, lack of vitamin D, calcium: lack of vitamin D, calcium will cause sudden convulsions when the baby sleeps, will be recurrent, recovered after the normal mind. Need to improve the trace element test, follow the doctor’s instructions to supplement vitamin D and calcium; 3, high fever convulsions: convulsions when the child’s body temperature rises suddenly, up to 38 ℃ or more, is a sudden attack, manifested as a twitch of the limbs, mouth foam, closed teeth, lips purple, accompanied by impaired consciousness, but the duration is short. Need to be rushed to the hospital, follow medical advice for oxygen, give acetaminophen and other drugs to reduce heat treatment; 4, epilepsy: seizures suddenly appear convulsions, accompanied by oral foam, teeth closed and other symptoms, the length of the seizure varies, some less than 30 seconds each time, can be frequent seizures, almost every night, but also occasionally seizures. It is necessary to perfect EEG examination and use anti-epileptic drugs such as sodium valproate, carbamazepine as prescribed by the doctor, and surgery if necessary; 5. Central nervous system infection: The pathogen mainly infects brain cells through the blood-brain barrier, causing abnormal brain discharge and then symptoms such as sudden convulsions and fainting when the baby sleeps. Lumbar puncture needs to be perfected to assist in diagnosis. Treatment requires active anti-infection treatment, such as bacterial infection can be applied to penicillin, ampicillin and other antibacterial drugs; 6, other: sleep jumping, infantile spasms and other diseases can lead to sudden convulsions when the baby sleeps, it is recommended to seek medical attention in a timely manner to clarify the cause of treatment.