Periarthritis is a chronic aseptic inflammation of the joint capsule and soft tissues surrounding the shoulder joint caused by injury and degeneration of the muscles, ligaments, tendons, bursa and joint capsule. Its clinical manifestations are slow onset and long duration, usually within 1 year, or 1-2 years in longer cases. The pain can spread to the neck and upper limbs (especially the elbow), and when the shoulder is bumped or stretched by chance, it can cause severe pain like tearing. Most patients often complain of waking up with pain in the second half of the night, unable to sleep, especially unable to lie down on the affected side, which is more obvious in cases caused by blood deficiency; if the pain is caused by cold, it is particularly sensitive to climate change. 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 pain points around the shoulder joint, mostly in the long head tendon groove of the biceps. The subacromial bursa, rostral process, and supraspinatus attachment point.