Wrist tfcc injury (triangular fibrocartilage injury of the wrist) symptoms for wrist pain, elastic bulge, wrist swelling and activity limitation and other symptoms, severe cases can be complicated by triangular cartilage injury and lower ulnar-radial joint arthritis. 1. Wrist pain: limited to the lower ulnar-radial joint and ulnar styloid, aggravated by rotation and ulnar deviation. 2. Elastic bulge: compared with the healthy side, the ulnar tuberosity can be seen bulging to the dorsal or palmar side, which can be reset by pressure, and then return to the original place when lifting the hand. 3. Swelling of the wrist: the degree of swelling is usually mild. 4. Restriction of activity: the activity is obviously restricted due to the rotation and ulnar deviation of the forearm on the affected side because of the pain, especially when accompanied by the damage of the deltoid cartilage. Lower ulnar radial joint subluxation should reduce all the risk factors of wrist sprain, pay attention to safety; avoid excessive force and excessive weight bearing on the wrist, develop good habits, move the joints more, promote blood circulation, increase body flexibility, reduce the probability of sprain.