γγThe full name of frozen shoulder is periarthritis, which occurs in people around 50 years old, so it is also called “fifty shoulder”. It is a chronic aseptic inflammation of the soft tissues around the shoulder joint, including the muscles, tendons, bursa and joint capsule. The inflammation leads to adhesions inside and outside the joint, thus affecting the movement of the shoulder joint. The lesion is characterized by widespread, i.e., widespread pain, widespread functional limitation, and widespread pressure pain. The causes are: 1. Degenerative factors As we age, the bones, muscles, ligaments and other soft tissues have a natural degenerative process, and the ability to withstand various external forces is weakened. Any inflammatory changes in the structures near the shoulder joint can be the cause of frozen shoulder. After an acute contusion or strain injury of the shoulder due to improper treatment, such as in the acute inflammatory phase, which cannot be treated in time, its inflammation can spread to the joint capsule, ligaments and other soft tissues. Biceps long head tendonitis is the most common induced. Cervical spondylosis, heart, lung and biliary tract diseases occur in the shoulder involvement pain, because the original disease does not heal for a long time so that the shoulder muscle persistent spasm, ischemia and the formation of inflammatory lesions, transformed into a real frozen shoulder.γγ3.Environmental factors Mainly wind, cold and damp evil invasion, especially in middle-aged and elderly people, tissue degeneration, adaptability decreases, wind, cold and damp evil invade the soft tissues of the shoulder, the function of the shoulder to resist external evil decreases, easily trigger and aggravate shoulder periarthritis.