Pain in the elbow occurs for the following common reasons: First, trauma, joint sprain can occur during the movement of the elbow joint, which can manifest as local swelling, pain, restricted movement, and in severe cases, dislocation and fracture of the elbow joint, and X-ray can confirm the presence of fracture and dislocation. Second, synovitis in the elbow joint, degenerative changes in the elbow joint, synovial inflammation can occur, the patient will have elbow joint pain symptoms, and may be accompanied by elbow joint effusion, joint swelling and restricted movement, serious cases will also occur in the elbow joint range of motion reduction, elbow joint deformity, can not be straightened and flexed. Third, rheumatoid arthritis and rheumatoid arthritis can cause symmetrical bilateral elbow joint pain, swelling, and limitation of movement, as well as typical joint stiffness in the morning, requiring a longer period of time to recover.