The three main features of a wrist fracture are deformity, abnormal activity, and bone rubbing sound or bone rubbing sensation, which are also characteristic signs of most fractures. But they are not the only three features. 1. Deformity: the wrist is mainly composed of 8 carpal bones and the distal ulnar radius, proximal metacarpal to the relevant joints, with the help of ligaments and other tissues, the surrounding tissues cover less, so the fracture will appear after the local angular deformity. 2. Abnormal activity: after wrist fracture, its surrounding tissues lose the fixation of bone tissues, or the displacement of the fracture block can cause abnormal activity of the wrist. 3. Bone friction sound or bone friction sensation: When the wrist is fractured, the broken ends of the fracture rub against each other due to the activity, resulting in bone friction sound or bone friction sensation. The above three characteristics are unique to most fractures and are important in the diagnosis of a fracture.