Numbness of the hands may be related to improper posture, carpal tunnel syndrome, cervical spondylosis, diabetes complications and other reasons. 1. Improper posture: due to improper posture pressure to the hand, can affect the blood supply of the hand, resulting in numbness of the hand, after lifting the compression, usually a few minutes can be restored. 2. Carpal tunnel syndrome: due to the ulnar nerve, median nerve and other nerves are compressed, there can be numbness in the hand. 3. Cervical spondylosis: If the cervical disc herniation compresses the nerve root innervating the hand, it can make the hand appear numb and tingly feeling. 4. Diabetic complications: If diabetes is complicated by peripheral neuropathy, it may cause numbness in the hands. It is recommended that people with numbness in the hands go to a regular hospital in time to clarify the cause, if treatment is needed, it should be standardized under the guidance of a doctor.