Wrist bone protrudes a small tip to consider the radial tuberosity stenosis tenosynovitis, osteophytes, joint dislocation, bone tumor and other causes. 1. Stenosing tenosynovitis of the radial tuberosity: because of the thickening of the tendon sheath at the radial tuberosity caused by chronic strain injury, there is a small tip when touching, accompanied by wrist joint pain and limited activities. 2. Osteochondrosis: degeneration of wrist joint, joint hyperplasia, degeneration of articular cartilage can appear localized touch with a small tip of the feeling, localized pressure and pain, X-ray film can be a clear diagnosis. 3. Joint dislocation: due to trauma caused by joint dislocation, joint structure changes, can appear wrist bone protrudes a small tip of the symptoms. X-ray can be taken to make a clear diagnosis. 4. Bone tumors: such as osteochondroma, osteosarcoma, osteoblastoma, etc., because of the change of bone quality and the abnormal position of bones, can cause wrist bone protruding with a small tip. Wrist bone protrudes a small tip need to go to the hospital to take pictures to check the clear diagnosis and further treatment.