Swelling and pain in the elbow is a common condition in hospitals, and the most common type of swelling and pain in the elbow is tennis elbow. Tennis elbow, the proprietary medical name for the humerus epicondylitis, is attached to the humerus epicondylar extensor muscle overuse injury caused by tendon degeneration, the radial short wrist extensor muscle as the main injury muscle, elbow pain, pressure pain swelling: clavicle fracture manifestation of localized swelling, pain, pain, pressure pain are more obvious. Elbow pain: lateral epicondylitis of the humerus, lateral epicondylar neurovascular bundle of the humerus is embedded in the pressure, etc. will cause elbow pain. Elbow sprain: elbow sprain is mostly under the action of external force, which makes the elbow undergo an extraordinary range of activities, causing injury to the medial and lateral collateral ligaments of the elbow Elbow swelling and pain on the lateral side of the elbow and dysfunction: half of the humerus fracture of the humerus tuberosity is also known as the Hahn-steinthal fracture, Symptoms and Signs: elbow swelling and pain on the lateral side of the elbow, elbow flexion and extension dysfunction. After trauma to the elbow joint, there is severe pain, extensive pressure pain, obvious swelling, which may be accompanied by subcutaneous bruising. The transverse diameter of the lower end of the humerus can be widened in severe cases of fracture displacement, and there can be shortening deformity of the upper arm in severe cases of overlap displacement. The elbow joint is in half-extension position, the forearm is rotated forward, the bony structure of the posterior triangle of the elbow is disordered, the fracture block can be touched, and the bone friction sensation is obvious. Sometimes it can be combined with nerve and blood vessel injury, which should be paid attention to during examination.