Periarthritis, or frozen shoulder, is a widespread inflammatory reaction caused by degenerative changes in the soft tissues of the muscles, tendons, bursa and joint capsule around the shoulder. The disease is a chronic disorder characterized by pain and limited movement of the shoulder joint. The age of onset is mostly in the 50s. It is more common in women than in men, and is more common on the left side than on the right side, and less common on both sides. In the early stage, the pain is mainly pain, or there is only a slight vague pain or discomfort and constriction in the shoulder joint; then the pain gradually increases, especially at night, often affecting sleep, and the shoulder joint movement is gradually and completely restricted; finally, a “frozen state” is formed. This disease is also known as frozen shoulder, frozen shoulder, frozen shoulder, frozen shoulder, etc. What can cause frozen shoulder? According to modern medicine, the cause of this disease is not completely clear, but according to clinical observation and experimental research, this disease may be related to the following factors. 1.Geriatric degeneration: This disease is mostly seen in middle-aged and elderly women over 40 to 50 years old, which is obviously related to geriatric degeneration. 2. Physical factors: A significant number of patients have a history of wind-damp cold attack before the onset of the disease, such as living in a humid place, having a stroke or sleeping with an exposed shoulder, etc. This means that wind-damp cold attack is one of the external causes of frozen shoulder. 3. Reduced shoulder activity: The clinical characteristics of this disease are mostly seen in middle-aged women with gradually reduced shoulder activity, and the incidence of the left shoulder is more than that of the right shoulder, and the incidence of mental workers is more than that of manual workers, or for some reasons (such as upper limb fracture, shoulder soft tissue injury, cervical spondylosis and other patients with reduced or restricted shoulder activity), the shoulder activity is reduced and often secondary to frozen shoulder, all these characteristics suggest that the shoulder These characteristics suggest that the reduced activity of the shoulder may be related to the onset of the disease. What are the manifestations of frozen shoulder? 1. Shoulder pain: At first, the shoulder is in paroxysmal pain, most of them are chronic, later the pain is gradually increased or stabbing pain, and it is persistent. Most patients often complain of waking up in the second half of the night with pain, unable to sleep, especially unable to lie down on the affected side, which is more obvious if the pain is caused by blood deficiency. As the disease progresses, the muscle strength gradually decreases due to the adhesions of the joint capsule and the soft tissues around the shoulder caused by long-term disuse, 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 have obvious pressure pain points around the shoulder joint, mostly in the long head tendon groove of the biceps. The pressure points are mostly in the subacromial bursa, rostral process and supraspinatus attachment points, especially in the long head tendon groove of the biceps tendon, and in a few cases, there is widespread pressure pain in the soft tissue around the shoulder. 5.Muscle spasm and atrophy: Spasm of the deltoid, supraspinatus and other muscles around the shoulder may occur 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. 6.X-ray and laboratory examination: Most of the routine radiographs are normal. In the late stage, some patients can see osteoporosis, but there is no bone destruction, and calcification shadow can be seen under the shoulder peak. Laboratory tests are mostly normal.