Frozen shoulder can cause adhesion of soft tissues around the shoulder joint, and patients can show symptoms such as shoulder joint pain, swelling, limited shoulder joint activities and muscle atrophy. 1. Shoulder joint pain: because frozen shoulder is a sterile inflammatory disease, when adhesion occurs, it can be manifested as shoulder joint pain, and the pain is obvious at night and when the shoulder joint is moving. 2. Shoulder joint swelling: because of the sterile inflammatory reaction in the shoulder joint, there may be oozing from the local tissues, which may cause swelling of the shoulder joint. In addition, the adhesion of shoulder joint affects the blood circulation of shoulder joint, so it can also cause swelling. 3. Restriction of shoulder joint activities: when the tissues around the shoulder joint are adhered, the activities of the shoulder joint can be affected, limiting the shoulder joint’s lifting, abduction, internal rotation, and backward extension and so on. 4. Muscle atrophy: Because the activity of the shoulder joint is reduced after adhesion, and the pain in the shoulder joint is obvious, which affects the activity of the shoulder joint, the prolonged inactivity causes the useless atrophy of the muscles around the shoulder joint, and the upper limb becomes thinner compared with the healthy side. When shoulder joint pain, etc. occurs, it is necessary to go to the hospital in time for treatment by a specialized physician.