There are many causes of numbness in the hands at night while sleeping, common ones being cervical spine disease, carpal tunnel syndrome, diabetes, etc. 1. Cervical spine disease: cervical spine degenerative lesions, sleep for a long time at night in a position, may compress the nerve root, radiating to the hand, thus appearing hand numbness symptoms. 2. Carpal tunnel syndrome: sleeping at night due to exogenous compression, or internal infection and other factors, resulting in carpal tunnel stenosis, will affect the sensory nerves innervating the fingers is abnormal, there will be sleeping hand numbness symptoms. 3. Diabetes: Diabetes may cause peripheral neuritis of the hand, which may also lead to numbness of the hand at night. Tingling hands at night, there may be other reasons, such as cerebrovascular disease, etc., should go to the hospital in a timely manner to check, clarify the cause of the disease, and comply with the doctor’s instructions to standardize the treatment.