Numbness is a sensation, the sensation is generally innervated, if the pressure to the blood vessels, nerves or nerve damage may occur hand numbness, common causes include poor posture, cervical spondylosis, carpal tunnel syndrome, neuritis, nerve damage, cerebrovascular disease, etc. 1, poor posture: if you maintain a posture for a long time, will compress the local blood vessels, muscles, local blood circulation is not smooth, will appear Hand numbness symptoms; 2, cervical spondylosis: mostly seen in the elderly, due to cervical disc degeneration protrusion and other compression of the cervical nerve root or cervical medulla, can cause unilateral or bilateral finger numbness; 3, carpal tunnel syndrome: the sensation of the ring finger is innervated by the ulnar nerve and median nerve, when carpal tunnel syndrome occurs, the median nerve is compressed, the numbness of the fingers; 4, neuritis: when the peripheral nerves of the fingers due to poisoning, infection, Vitamin B deficiency and other reasons, causing inflammatory reactions, there will be ring finger tip numbness, pain, etc.; 5, nerve damage: such as finger, hand, wrist cutting injuries or machine injuries may hurt the peripheral nerves, causing ring finger tip numbness; 6, cerebrovascular disease: common is cerebral infarction, brain hemorrhage, if the infarction of patients with cerebral infarction site just affect the transmission of sensation, there will be local finger numbness The situation. Generally found after the numbness of the finger, it is recommended that you can first move to see if the symptoms can improve, possibly due to prolonged local pressure, if it can improve, you can consider first observe, if it persists, it is recommended to go to the hospital in a timely manner to exclude the risk of cerebrovascular disease.