Frozen shoulder is the abbreviation of periarthritis, it is an orthopedic disease that seriously affects the joint activities of the shoulder, people who are engaged in long-term physical labor are prone to it; it is caused by external wind and cold, humidity and muscle injury, which causes chronic aseptic inflammation of local soft tissues including joint capsule, ligaments and muscle tendons, its symptoms are different than other inflammatory diseases, the body temperature will not rise, local redness, swelling and heat will not be manifested, but it will have local tissue congestion. What are the symptoms of frozen shoulder? 1. Pain in the shoulder. The symptoms of early frozen shoulder are mainly paroxysmal pain in the shoulder, and it is chronic. The pain is characterized by lightness during the day and heaviness at night. Patients may wake up at night with pain and have difficulty sleeping and cannot lie on the affected side. 2. Restricted movement of the shoulder joint. The shoulder joint movement is limited in all directions, and it is difficult to abduct, lift, and rotate internally and externally, otherwise tearing pain will occur. Due to the adhesion of the joint capsule and the soft tissues around the shoulder caused by long-term disuse, the muscle strength gradually decreases, so that the active and passive activities of the shoulder joint in all directions are limited, and the shoulder joint will have difficulty in abduction such as combing, dressing, forking, etc. In severe cases, it will also affect the function of the elbow joint, and it will be difficult to feel the ipsilateral shoulder with the flexed elbow. This is one of the most important symptoms of frozen shoulder. 3. Fear of cold. Fear of cold is also one of the main symptoms of frozen shoulder. Because the affected shoulder is afraid of cold, the patient has to use cotton pads to wrap the shoulder all year round, although in the hot summer, the shoulder does not dare to blow. 4. Pressure pain. People suffering from frozen shoulder can touch pressure pain points around the shoulder joint. This pressure pain points are mostly in the long head tendon groove of biceps, subacromial bursa, scapular band muscle, etc. The pressure pain is mild or no pressure pain, and its duration is long, usually 2 months.