Hand numbness may be physiological factors, cervical spondylosis, carpal tunnel syndrome, diabetes and other factors. 1. Physiological factors: the hand for a long time to maintain a position, or a long time by the pressure, resulting in blood flow obstruction, will lead to frequent numbness of the hand, in the daily should often move the limbs, and to avoid a position for too long, do not exist compression factors. 2. Cervical spondylosis: long hours of work or long hours of head down to play the phone, easy to induce nerve root cervical spondylosis, will lead to hand numbness, may also be accompanied by numbness of the upper extremities, upper extremity radiating pain and other symptoms. 3. Carpal tunnel syndrome: may be related to trauma, chronic strain and other factors, resulting in the nerve innervating the hand by the cardinal pressure, will cause the hand numbness, may also be accompanied by finger weakness, and in severe cases can cause muscle atrophy. 4. Diabetes: the presence of diabetes for a long time, may damage the peripheral nerves, causing peripheral neuropathy, which can lead to numbness of the hand, and hand sensation will gradually decline. Hand numbness, and exclude the physiological factors, should be alert for disease factors, it is recommended that the appropriate medical examination and treatment.