Hands fingers woke up instant numbness may be caused by nerve compression, cervical spondylosis and diabetes. 1. Nerve compression: due to improper sleeping posture, caused by the innervation of the hand nerve compression, such as the ulnar nerve or radial nerve compression, waking up instantly sometimes feel numbness in both hands fingers. 2. Cervical spondylosis: cervical spondylosis, if the bilateral nerve root compression, when waking up, the neck movement stimulates the nerve, sometimes can also appear instant numbness of the fingers. 3. Diabetes: diabetes caused by peripheral neuropathy can occur in both upper limbs and lower limbs symmetrical numbness, and sometimes there will be the phenomenon. Fingers woke up instant numbness in both hands may have other reasons, such as neurosis, etc., if the symptoms continue to improve, should be timely to the regular hospital, the doctor according to the specific conditions to give the correct treatment.