Patients with swelling and pressure pain in the elbow may find pressure pain at the beginning of the radial short extensor carpi radialis, i.e., the external superior elbow joint, on examination. Joint mobility is normal and local swelling is uncommon. Patients with internal rotation of the forearm and repetitive injury mechanism of the wrist joint from palmar flexion to dorsal extension will have pain in the external supra-elbow joint. X-rays are generally not required. If necessary, X-rays can be taken to find out whether the bones of the elbow joint are normal and whether there are calcium salt deposits at the proximal end of the extensor tendon. Any movement of the elbow joint that exceeds the normal range of motion can cause internal and external soft tissue injury. Commonly, there are tears of the ulnar and radial collateral ligaments of the elbow joint, partial tears of the joint capsule, biceps tendon and other tears of the elbow muscles, ligaments and fascia. Some sprains and contusions of the elbow joint become prominent after the fracture or dislocation is corrected, while some sports cause sprains and contusions of the elbow joint, which are not noticed after the injury until complications arise and cause limitation of elbow joint movement. Direct violence can cause soft tissue contusions of the elbow joint, such as falling and slipping, palm bracing, and conduction violence can cause excessive abduction, extension, or twisting of the elbow joint, resulting in elbow joint sprain. Since the stability of the joint mainly relies on the joint capsule and ligament restraint, the radial ligament injury is the most common in clinical practice, followed by the ulnar side and less frequently the posterior side. Severe elbow sprains and contusions, post-injury immobilization or improper fixation, or due to inappropriate repeated massage, can cause the hematoma to enlarge. Such hematomas are intra-soft tissue hematomas and subperiosteal hematomas, often communicating with each other. During the mechanization of the hematoma, calcification and ossification of the periarticular tissues are caused through subperiosteal ossification, as well as the entry of intraosseous calcium into the connective tissue mass, which results in the so-called ossifying myositis.