People over 60 years old: more than 30% have rotator cuff injury Treating rotator cuff injury as frozen shoulder, the more you treat it, the more powerful it becomes. From a medical point of view, frozen shoulder, which is often mentioned, is actually an inflammatory change of joint capsule contracture and fibrosis, which is a sterile inflammatory disease that can be cured without treatment. The clinical incidence of frozen shoulder only accounts for about 5% of shoulder pain. In fact, about 70% of older people over the age of 60 who visit the doctor for shoulder pain actually suffer from rotator cuff injury, which has some similar symptoms to frozen shoulder. Rotator cuff injuries are mainly characterized by pain during shoulder abduction and supination and nighttime pain, and in severe cases, weakness in supination. If a rotator cuff injury is mistaken for “frozen shoulder” and patients with rotator cuff tears are allowed to continue to exercise such as “wall climbing” or artificially massage and loosen the shoulder joint with various techniques, it may cause the rotator cuff rupture to continue to expand and eventually form a serious or irreparable rotator cuff injury. This is the reason why many patients with frozen shoulder get worse the more they exercise. Rotator cuff injuries are more common among manual workers and teachers who often have to do arm lifts, as well as older adults. Dr. Shih says that about 30 percent of people over the age of 60 have rotator cuff injuries of varying degrees, because older people have ligamentous metamorphosis that prevents them from protecting the rotator cuff. To distinguish rotator cuff injury from frozen shoulder, a professional physical examination is required, and a clear diagnosis by a professional orthopedic surgeon is required. However, you can make a general judgment. Generally speaking, frozen shoulder is characterized by limited movement of the arm and shoulder joint in all directions, with a full range of pain in the shoulder, a large pain area, and difficulty in pointing out a clear pain area. In contrast, rotator cuff injury is more likely to be characterized by weakness, limited pain, and the painful area can be pointed out with the hand. In addition, frozen shoulder usually heals on its own and does not recur, but rotator cuff injuries can sometimes be relieved, but can recur again and again. What is the rotator cuff? ”The rotator cuff is a complex of tendons that surrounds the humeral head and consists of four tendons that surround the shoulder joint. These tendons protect the shoulder joint, maintain the stability of the shoulder joint, and are responsible for the internal, external, and supination activities of the shoulder joint. Since the supraspinatus tendon is attached to the uppermost part of the greater tuberosity of the humerus, it is easily damaged by extrusion and friction, making it a weak point of the rotator cuff. When the shoulder joint does abrupt inward activities in the outer booth, it is prone to rupture, and the gravity of the limb and the pulling of the rotator cuff will make the rupture bigger and bigger, which is not easy to heal.