The first step is to make sure it is frozen shoulder and not some other condition that can cause shoulder pain, such as rotator cuff injury or acromion impingement syndrome. This requires an examination by a specialist. Frozen shoulder is also called frozen shoulder, or contracture capsulitis. Most patients develop it without any obvious trauma or with only minor trauma. The symptoms are mainly pain and limitation of the full range of motion of the shoulder joint. Frozen shoulder was previously thought to be a self-limiting disease with a duration of 12-36 months. However, recent studies have found that in a significant proportion of patients, frozen shoulder does not resolve spontaneously and patients remain symptomatic for the rest of their lives. In a proportion of patients, although the disease eventually resolves spontaneously, the duration of the disease is too long and the symptoms too severe, with serious consequences for the quality of life. The treatment of frozen shoulder as a whole looks at the impact on daily life. The first step is to take conservative treatment. If the normal joint function is 100 points and the affected shoulder has a functional score of 60 or less due to pain and stiffness caused by frozen shoulder, which is called severe dysfunction, and conservative treatment is ineffective for 3 months, surgery is recommended. Currently, arthroscopic all-around shoulder release is the only method that can terminate the course of frozen shoulder in a predictable time. The vast majority of patients have maximum functional recovery, or termination of the disease, at 3 months postoperatively. If the functional impact of the shoulder joint is not significant, for example, if the overall functional score is above 80, conservative treatment is recommended. There are three stages of frozen shoulder in terms of disease course: the initiation phase, the freezing phase, and the thawing phase. During the freezing phase, most doctors are reluctant to operate on the patient, even though the function of the shoulder joint may be severely affected. This is mainly because the surgeon does not know what to expect and is afraid that the patient will still enter the freezing phase and the surgery will be ineffective. However, our study showed that the vast majority of patients terminate their disease after 3-4 months after surgery and no longer enter the freezing phase. Therefore, surgical treatment at the beginning of the freezing phase has its value. Another advantage of surgery during the thawing phase is that the joint is not severely contracted and the operation is relatively simple. Most surgeons are also reluctant to operate on patients during the pre-freeze and thaw phases. This is mainly because patients in this stage have severe joint contracture and the arthroscope may not be able to insert into the joint at all, making it impossible to complete the surgery. We classify the degree of shoulder contracture in patients with frozen shoulder into four degrees: mild contracture, moderate contracture, moderate contracture, and extreme contracture. Different release methods are designed for different degrees of contracture. Even for patients with extreme contracture, it is possible to perform efficient and safe release by a special release method. Therefore, we take a more aggressive approach to the treatment of patients in the pre-frozen and thawed phases, since their function is often severely affected and there are no technical obstacles. The outcome of surgical treatment of patients with frozen shoulder is greatly related to the surgical approach. Our experience: ensuring the outcome of the treatment requires the completion of the following parts of the surgery: (1) 360 degree release of the shoulder joint; (2) complete excision of the inflammatory tissue in the rotator cuff space instead of simple release; (3) 270 degree release of the subscapularis muscle; (4) fixation of the biceps tendon; (5) complete excision of the inflammatory synovial membrane in the intra-articular, acromion and subdeltoid bursa.