A small amount of fluid is usually present during the onset of frozen shoulder. 1. Frozen shoulder is an aseptic inflammatory disease caused by the strain on the muscles, ligaments, joint capsule and other tissues around the shoulder, and the inflammatory reaction will cause a small amount of fluid to accumulate in the cavity of the shoulder joint, which usually does not cause swelling of the shoulder joint, and most of them do not need to be treated by arthrocentesis and aspiration of the fluid. 2. A small amount of fluid in the shoulder joint can be treated by hot compresses, baking, massage and other physiotherapy methods to promote local blood circulation and fluid absorption. Oral anti-inflammatory and analgesic drugs such as nimesulide and diclofenac sodium can also be used to relieve pain and inflammation. At the same time to strengthen the shoulder joint function exercise, such as doing wall climbing movement, hanging bar and so on. The fluid will be gradually absorbed after the shoulder joint function is restored. If the symptoms of frozen shoulder, it is recommended that patients go to the hospital to improve the examination and receive regular treatment.