Patients with elbow joint effusion can be treated conservatively and surgically to relieve the symptoms, as follows: First, conservative treatment: mild to moderate elbow joint effusion can be treated with microwave therapy, ultrashort wave therapy, elbow joint braking, rest, hot compresses on the elbow joint, and treatment with non-steroidal anti-inflammatory drugs, such as celecoxib. Through the above treatment, the elbow joint fluid can be gradually absorbed, and slightly severe cases can also be combined with arthrocentesis and fluid extraction. Second, surgical treatment: Patients with more serious elbow joint effusion, usually accompanied by elbow joint dysfunction, can be considered for minimally invasive elbow arthroscopic surgery to remove joint effusion, clean up inflammatory synovial membrane, and remove free bodies in the joint to reduce cartilage wear and tear, which can relieve clinical symptoms, according to the MRI examination results. Therefore, patients with elbow joint effusion should choose the appropriate treatment according to different degrees.