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. Frozen shoulder develops mostly at the age of 40 or older, with a slightly higher incidence in women than in men, and is mostly seen in manual workers. Since people around 50 years old are prone to this disease, the disease is also known as fifty shoulder. Frozen shoulder is a common disease that is characterized by pain in the shoulder joint, followed by paroxysmal pain and movement disorders. Frozen shoulder is characterized by widespread pain, functional limitation and pressure pain. As the duration of frozen shoulder increases, the pain becomes more widespread and involves the middle part of the upper arm, with limited movement of the shoulder joint. If you want to increase the range of motion, severe sharp pain will occur. In severe cases, the affected limb cannot comb the hair, wash the face or buckle the belt. At night, the shoulder may wake up with pain due to turning and moving. Most patients have chronic pain, but there are also acute pain episodes, and some patients just feel discomfort and constriction in the shoulder. As the course of frozen shoulder extends, the pain becomes more widespread and involves the middle part of the upper arm, with limited movement of the shoulder joint. If you want to increase the range of motion, you will experience severe pain. If the shoulder pain is not treated in time, it will increase rapidly. In severe cases, the affected limb cannot comb the hair, wash the face or buckle the belt, and muscle spasm and pain symptoms will appear, especially at night, when the pain increases and the person cannot turn over, affecting sleep. In the chronic stage, the painful symptoms of frozen shoulder will slowly disappear. However, the symptoms of contracture and stiffness of the shoulder joint slowly come to the fore, and the movement is limited or even impossible. Frozen shoulder has a slow onset and a long course, usually within 1 year, or 1-2 years in the longer cases. Some patients are often treated for months, six months, or even up to a year. Patients often lose their confidence in treatment because of this. The introduction of acupuncture therapy has completely changed this situation. By releasing the soft tissue adhesions around the shoulder, acupuncture can release the inflammatory lesions and stretch the shoulder joint with restricted movement. For patients with frozen shoulder, the acupuncture course is short and effective, requiring only one treatment per week, and the average number of cures is only about four, which also saves patients a lot of valuable time.