The body shakes violently, may be due to mental psychological factors, environmental factors, disease factors and other reasons. 1. Psychological factors: the body shakes violently due to sudden strong mental stimulation, mental stress, sudden shock and other reasons. 2. Environmental factors: when the body suddenly moves from a warm environment to a cooler or colder environment, symptoms of body shaking can occur, such as when the water temperature suddenly becomes low during bathing. 3. Disease factors: epilepsy myoclonic seizures, such as epilepsy, can show sudden body shaking symptoms; such as sudden high fever, the body can also appear sudden shaking symptoms. If the symptoms of sudden shaking of the body continue without relief, you should go to the hospital in time to clarify the cause of the disease and symptomatic treatment.