Judgment of fracture is mainly based on the specific manifestations and combined with the results of relevant auxiliary examinations for comprehensive assessment. 1. Clinical manifestations: most of the fractures have a history of trauma, after which local pain, swelling and limitation of movement may occur, partly accompanied by subcutaneous bruising. The fracture produces pain, which will be aggravated by activity, and is accompanied by limited tenderness, localized swelling, as well as petechiae and dysfunction. 2. Physical examination: the proprietary signs of fracture, such as deformity, abnormal activity, and bone friction sound or bone friction sensation, any one of the above three proprietary signs can determine the occurrence of the fracture. 3. Auxiliary examination: Some fractures are very similar to soft tissue injuries, and the type and degree of fracture can be determined by imaging. The diagnosis can be confirmed basically if the fracture is found to have broken bone cortex, fracture lines and discontinuity of bone trabeculae on the X-ray film. In addition, some hidden fractures, which are not clear enough on X-ray or are interfered by other organs, can be diagnosed with the help of three-dimensional CT examination.