In China, people with shoulder pain and limited movement think they have “frozen shoulder”, and even some orthopedic surgeons often use the term “frozen shoulder” to diagnose shoulder pain in a general way. In fact, shoulder pain is not equal to “frozen shoulder” at all. ”With the development of shoulder surgery, especially the clinical application of MRI and CT, doctors have realized that there are many diseases that cause shoulder pain, including rotator cuff injury, acromioclavicular impingement, rostral impingement, shoulder adhesive capsulitis (frozen shoulder), SLAP Injuries, shoulder instability, tendinopathy, calcific supraspinatus tendinitis, acromioclavicular joint disease, shoulder osteoarthritis, thoracic outlet syndrome, etc. The common people think of “frozen shoulder” as “adhesive capsulitis”, because it occurs in middle-aged and elderly people around 50 years old, and is commonly known as “fifty shoulder” in China. It has an incidence of about 2% to 5%, and is more common in women than men. Some studies have found that the incidence of rotator cuff injury and acromioclavicular impingement is the highest among elderly people over 60 years old who visit the doctor for shoulder pain, reaching 85%, which is much higher than the so-called “frozen shoulder” (frozen shoulder). Because the differential diagnosis of shoulder pain is inherently difficult, doctors without specialized training in shoulder surgery lack diagnostic certainty. The diagnosis of “frozen shoulder” has been abused for many years and is like a “garbage can”, where all shoulder pains that are not understood are thrown into the garbage can of “frozen shoulder”. This has led to many underdiagnosis, misdiagnosis and misdiagnosis, for example, some of the functional exercises for “acromioclavicular impingement” and “frozen shoulder” are opposite, and if you follow the exercises for “pulling the hoop, climbing high, and throwing the arm” as in the case of frozen shoulder, it may cause shoulder pain. For example, some functional exercises for “frozen shoulder” and “rotator cuff impingement” are opposite. In recent years, minimally invasive shoulder arthroscopy technology has developed rapidly. Shoulder arthroscopy is incomparable to any other treatment and traditional incision surgery in treating shoulder joint pain and activity restriction, which can relieve shoulder joint pain, repair torn rotator cuff and restore joint stability with a few small incisions.