Numbness of one finger may be caused by physiological factors, cervical spondylosis, carpal tunnel syndrome, elbow syndrome, peripheral neuritis and other factors. 1. Physiological factors: poor posture, resulting in a finger for a long time by the pressure, so that the local ischemia, will make a finger numbness, adjust the posture can be improved on their own. 2. Cervical spondylosis: keeping the same posture for a long time, such as working at a desk, etc., may induce cervical spondylosis, the nerve innervating the upper limb caused by compression, which may cause numbness of the fingers. It can also be accompanied by upper extremity radiating pain, upper extremity numbness, neck and shoulder pain and other symptoms. 3. Carpal tunnel syndrome: when there is carpal tunnel syndrome, it can lead to the compression and stimulation of the median nerve, which can only be manifested in one finger at the initial stage, and with the progress of the disease, it can be manifested in the thumb, the finger, and the middle finger, and it can also lead to numbness and pain in some areas of the palm of the hand. 4. Elbow tube syndrome: it may be related to chronic strain injury and other factors, the ulnar nerve is obviously compressed, initially only in one finger, with the progress of the disease manifested in the little finger, ring finger, may also be accompanied by numbness in the palm of the hand, the back of the hand numbness, etc., and in severe cases, it will lead to muscle weakness and muscle atrophy. 5. Peripheral neuritis: may be related to diabetes, viral infections and other factors, can lead to damage to the peripheral nerves, which will lead to one or more fingers numbness symptoms. A finger numbness, and accompanied by other abnormal manifestations, should be taken seriously, and actively seek medical attention to determine the cause of the disease, reasonable treatment.