Sleeping at night with numb hands, there are several situations: First, due to incorrect sleeping posture, the upper limbs are compressed, causing the nerves of the upper limbs, blood vessels, due to long-term pressure caused by a certain degree of injury or venous return obstruction, such cases will appear hand numbness. Generally through the improvement of sleeping posture, change the posture, the numbness will gradually disappear. Second, previous cervical spondylosis, incorrect sleeping posture or symptoms of nerve root damage, will also appear numbness in both hands, hypesthesia. Third, carpal tunnel syndrome, due to the daily need to repeat the finger movement of people, there is compression of the carpal tunnel on the median nerve, in the activity or when the symptoms are severe, there is arm or even hand numbness and pain. Fourth, a common disease, vitamin B deficiency is prone to anemia, tingling, hyperalgesia, especially vegetarians, more prone to vitamin B deficiency, and patients with digestive tract diseases, also prone to vitamin B deficiency, such people are prone to tingling symptoms in the hands and feet. Fifth, there is a terrible disease, is a precursor to stroke, the emergence of cerebrovascular disease patients, the early symptoms will have numbness and pain in the hands. People who have a previous history of related diseases and have numbness and pain in their hands should pay attention to stroke, seek medical attention as soon as possible, and go to the hospital to review the head CT or MRI to avoid missing the diagnosis.