Does shoulder pain mean that you have frozen shoulder? It is incorrect to categorize shoulder pain as frozen shoulder. In fact, the incidence of true frozen shoulder only accounts for 2% to 5% of shoulder pain patients, while the incidence of rotator cuff injury and acromioclavicular impingement is as high as 85%. A female patient who was over 50 years old often felt pain and weakness in her left shoulder and could not lift her arm for a year. She went to many hospitals and was treated for frozen shoulder, using western medicine, Chinese medicine, physical therapy, closure, acupuncture, tui-na and small acupuncture, all to no avail. The patient also had nighttime pain, especially when lying on her right side, and often woke up late at night with pain, making it difficult to even get dressed and take a shower. Recently, she went to the shoulder joint specialist at the hospital, and after examination, it was found that she was not suffering from frozen shoulder, but from “left rotator cuff injury”, and the injury was rather serious, which was later repaired by minimally invasive shoulder arthroscopy technology. Similar cases are often found in outpatient clinics. The shoulder joint is the joint with the largest range of motion and the most flexible of all joints in the human body, and it is also the joint with the most opportunities for injury, with shoulder pain accounting for 20% of orthopedic outpatient visits. However, there is still a lack of awareness and misconceptions about shoulder pain. It is commonly believed that shoulder pain is frozen shoulder, and even some orthopedic surgeons often use frozen shoulder to diagnose shoulder pain in a general way. With the development of shoulder surgery and the clinical application of MRI, CT and especially shoulder arthroscopy, the meaning of this diagnostic name has changed qualitatively. There are many diseases that cause shoulder pain, including rotator cuff injury, acromion impingement, rostral impingement, shoulder adhesive capsulitis (frozen shoulder), SLAP injury, shoulder instability, tendinopathy, and calcific supraspinatus tendinopathy. Calcific supraspinatus tendinitis, acromioclavicular arthropathy, acromioclavicular arthritis, thoracic outlet syndrome, etc. The incidence of true frozen shoulder only accounts for 2% to 5% of patients with shoulder pain, while the incidence of rotator cuff injury and acromioclavicular impingement is as high as 85%.