Auntie Li, who has been retired for two years, loves sports and has a rich and colorful life after retirement, going to the park every morning for morning exercise, attending the calligraphy class at the university in the morning and joining the community disco dance team in the evening. But recently the right shoulder pain for unknown reasons, activities are also limited, neither dance nor calligraphy, massage, cupping, acupuncture tried one by one, a few months have passed without improvement, the symptoms have a tendency to worsen, greatly affecting the quality of life. In an emergency, she came to the orthopedic clinic and was diagnosed with “frozen shoulder”. Auntie Li sucked in a breath of cold air. She had only heard of frozen shoulder before, but what is it all about? In fact, what we people call frozen shoulder is generally referred to in a narrow sense, that is, frozen shoulder, also known as adhesive capsulitis, characterized by limited active and passive activities of the shoulder joint, but no obvious abnormalities in imaging, and a few may have osteoporosis or tendon calcification. The incidence is 2% in the general population, and 70% of patients are women, mostly between the ages of 40 and 65. Secondary: There are three types of frozen shoulder secondary to certain diseases: (1) endogenous: rotator cuff disease resulting in active and passive limitation of motion (tendonitis, partial or total tears), biceps tendonitis, tendon calcification. (2) Exogenous: active and passive limitation of shoulder movement caused by factors outside the shoulder, such as ipsilateral breast surgery, cerebrovascular disease, humeral stem fracture, acromioclavicular arthritis, clavicle fracture, etc. (3) Systemic disease: Previous diabetes, thyroid disease and autoimmune disease. The course of frozen shoulder often lasts 12 to 24 months and goes through 3 stages: Frozen phase: lasts about 3 months, with pain triggered by active and passive activities, limited forward flexion, internal and external rotation of the shoulder, and arthroscopic findings of glenohumeral synovitis. Freezing stage: lasting 3 to 9 months, the pain level and limitation of shoulder joint movement further increases, the joint stiffens, the joint capsule thickens due to the limitation of movement (as shown in the figure), scar tissue is deposited, adhesions in the soft tissues around the joint are produced and affect daily work, even washing the face and combing the hair is difficult, and nighttime pain can seriously affect sleep. Thawing stage: The pain and stiffness will gradually disappear after 9 to 18 months. However, most of the patients cannot fully recover the function of the shoulder joint and will have joint movement disorders, so they need rehabilitation training or arthroscopic surgery to help restore the function of the shoulder joint. How can I diagnose myself if I have frozen shoulder? If you are between the ages of 40 and 65 and have the following symptoms, it is important to seek help from an orthopedic surgeon: shoulder pain of unknown origin gradually worsens; shoulder pain often radiates to the upper arm; movement is limited, but the strength of the shoulder does not diminish; you cannot sleep because of pain, or you wake up in pain when you press on the affected shoulder during sleep; the disease progresses and you have difficulty washing and dressing.