Pain in the medial aspect of the elbow joint is closely related to abnormalities in the surrounding tissues, including the medial aspect of the distal humerus, the medial aspect of the ulna, and the surrounding soft tissues, etc. The location of the pain mainly includes the medial aspect of the distal humerus and the ulna. 1. Distal medial humerus: injury to the flexor tendon, closely related to sports, will be accompanied by edema and partial tear of the flexor tendon, causing pain in the distal medial humerus. 2. Medial ulna: trauma or abrasion leads to ulnar collateral ligament injury, which will cause medial ulna pain, mainly manifested as pressure pain. 3. Peripheral soft tissues: edema and exudation of the peripheral soft tissues will cause pain and discomfort in the corresponding areas, and some of them will be accompanied by redness and swelling of the skin. If the pain on the inner side of the elbow joint can not be relieved, you need to go to orthopedic department of regular hospitals and do standardized treatment under the guidance of clinicians.