The body often shakes during sleep may be caused by the following reasons: 1, dreaming, some patients with sleep disorders will often dream, which is related to fatigue, tension and psychological stress. 2, rapid eye movement sleep phase behavior disorder, which is a sleep disorder, patients can appear frequent physical activity during sleep, and even have a tendency to violence and hurt people. 3, anxiety, depression, suffering from anxiety, depression and other adverse emotions. 4, Parkinson’s disease, Parkinson’s disease patients in the middle and late stages of the disease can appear autonomic dysfunction, which leads to frequent shaking of the patient’s body during sleep. In addition, patients with Lewy body dementia, Alzheimer’s disease, multi-system atrophy, will have the phenomenon of body shaking while sleeping.