Body shaking during sleep may be a normal phenomenon, but it may also be caused by hypocalcemia, epilepsy and other causes of muscle twitching. 1. The human body due to excessive fatigue, excessive exercise and other reasons, resulting in sleeping muscles are still in a state of excitement, prone to muscle spasms, manifested in the sleep of the body suddenly shaking, this is a normal phenomenon, do not need to worry. 2. Hypoparathyroidism and vitamin D deficiency can cause hypocalcemia, elevated neuromuscular stress, and muscle tremors during sleep or quiet time. 3. Some seizure-prone diseases such as cerebrovascular disease, tumors, or potential epilepsy can cause abnormal synchronous discharges of brain cells, local muscle twitching, and jittery movements during sleep. If the body shaking frequently occurs during sleep, it is recommended to go to the regular hospital for examination and treatment in time to avoid delaying the condition.