Clinically, hand numbness alone is unable to determine which disease is the precursor. Numbness of the hand is a feeling of the hand nerve, may be caused by neuropathy, local ischemia and other reasons, cervical spondylosis, carpal tunnel syndrome, arteriosclerosis, stroke and other pre-disease may have numbness of the hand symptoms. 1. Cervical spondylosis: patients suffering from cervical spondylosis, due to nerve compression will lead to numbness of the entire upper limbs, thus the symptoms of numbness in the hands. 2. Carpal tunnel syndrome: also known as mouse hand, due to frequent use of the mouse, the median nerve is compressed, resulting in narrowing of the carpal tunnel, numbness of the hand symptoms, while the hand and wrist activities will also be limited. 3. Arteriosclerosis: If the patient has arteriosclerosis of the upper limbs, the blood circulation is not smooth, the hand will appear numbness symptoms. 4. Cerebral stroke: the body is governed by the brain, and patients suffering from cerebral stroke may have the symptom of numbness on one side of the hand, accompanied by inflexibility of the same side of the limb, dysarthria and other symptoms. Patients with numbness of the hand should go to the hospital in time to find out the cause for treatment.