Hand numbness for a day may be due to cervical spondylosis, peripheral neuritis, trauma, carpal tunnel syndrome and other diseases. 1. Cervical spondylosis: cervical spondylosis is generally due to bad habits, cold, trauma and other reasons, patients who suffer from cervical spondylosis, usually accompanied by cervical vertebrae protrusion and hyperplasia and other phenomena, it may cause a certain amount of compression of the cervical nerve root, resulting in numbness of the hand symptoms. 2. Peripheral neuritis: patients who suffer from peripheral neuritis may also have sensory, autonomic, distal limb movement disorders, such as manifested in the body or local numbness, burning, pins and needles, etc., so the patient’s hand numbness may be caused by multiple peripheral neuritis. 3. Trauma: If the patient suffers from severe trauma, the nerve of the hand may be damaged, resulting in symptoms of hand numbness. 4. Carpal tunnel syndrome: if the patient suffers from carpal tunnel syndrome, the ligamentous tissue of the wrist will be thickened for a long time, it will compress the blood vessels and nerves, leading to symptoms of dysfunction, such as numbness and pain in the fingers. If the patient is persistent hand numbness, should also go to the hospital in a timely manner for relevant examinations, clear cause and then do the corresponding treatment.