Rattling in the shoulder joint may be related to keeping the shoulder joint in a fixed position for a long time and diseases such as frozen shoulder. If the shoulder joint is kept in a fixed position for a long time, abnormal rattling sound will appear when it is suddenly moved, which is caused by the rupture of air bubbles in the joint cavity under pressure during the joint movement, and this is a kind of physiological rattling sound, which usually does not cause symptoms such as shoulder joint pain, and the rattling sound will disappear after a few times of movement. Frozen shoulder due to the shoulder joint around the joint capsule, ligament damage to the formation of aseptic inflammation, repeated stimulation of inflammation will occur adhesion, friction between each other in the activities will appear rattling. In addition to rattling, most of the symptoms are accompanied by shoulder pain and restricted movement. If the shoulder joint is rattling, it is recommended that the patient go to the hospital for medical treatment to clarify the cause of the disease and guide the regular treatment.