Frozen shoulder is a chronic aseptic inflammation of the joint capsule and soft tissues around the shoulder joint caused by injury and degeneration of the muscles, ligaments, tendons, bursa and joint capsule. It has a slow onset and a long course, usually within 1 year, and in longer cases up to 1-2 years. Clinical manifestations: The disease is more common in women than in men, more on the left side than on the right side, or on both sides successively. The disease mostly affects middle-aged and elderly people. The pain can spread to the neck and upper limbs (especially the elbow), and when the shoulder is bumped or pulled by chance, it can cause severe pain like tearing. Most patients often complain of waking up in the second half of the night with pain, unable to sleep, especially unable to lie on the affected side. As the disease progresses, the adhesions of the joint capsule and the soft tissues around the shoulder caused by long-term disuse, the muscle strength gradually decreases, and the rostro-humeral ligament is fixed in a shortened internal rotation position, so that the active and passive activities of the shoulder joint in all directions are limited. “In severe cases, the function of the elbow joint may also be affected, and the hand cannot touch the ipsilateral shoulder when flexing the elbow, especially when the arm is posteriorly extended. 3. Fear of cold: The affected shoulder is afraid of cold, and many patients use cotton pads to wrap their shoulders all year round, and even in summer, the shoulder does not dare to blow. 4.Pressure pain: Most patients can feel obvious pressure points around the shoulder joint, mostly in the biceps longus tendon groove, subacromial bursa, rostral process, supraspinatus, infraspinatus, and large and small round muscle attachment points. 5.Muscle spasm and atrophy: The deltoid, supraspinatus and other muscles around the shoulder may spasm in the early stage, and disuse muscle atrophy may occur in the late stage, with typical symptoms such as shoulder peak protrusion, inconvenient lifting and unfavorable backbending. There is mild atrophy of the deltoid muscle and spasm of the trapezius muscle. The supraspinatus tendon, long and short head biceps tendons and the anterior and posterior edges of the deltoid muscle may have obvious pressure pain. The shoulder joint is most obviously limited in abduction, external rotation and posterior extension, and in a few people, internal retraction and internal rotation are also limited, but less limited in forward flexion. 6. X-ray and laboratory examination: Most of the routine films are normal, but in some patients, osteoporosis is seen in the later stages, but there is no bone destruction. Laboratory tests are mostly normal. In older patients or those with longer disease duration, osteoporosis of the shoulder, or calcification of the supraspinatus tendon and subacromial bursa can be seen on X-ray plain film.