I. What are the typical symptoms of rotator cuff injury? 1.Shoulder pain, especially obvious with the affected side of the hand of the supraspinatus activity. 2.Significant difference in active and passive range of motion. What examination is needed to confirm the diagnosis of rotator cuff injury? Physical examination: there is obvious difference between active and passive range of motion; the power of abduction and internal and external rotation is weakened. 2, auxiliary examination: the gold standard for diagnosing rotator cuff injury is MRI. What are the main contents of conservative treatment for rotator cuff injury? After diagnosis of rotator cuff injury, systematic symptomatic treatment, physical therapy and functional exercises should be carried out for at least 3 months. If the effect of conservative treatment is not satisfactory, surgery can be considered. Conservative treatment mainly includes the following: 1. Pain relief: oral pain medication (e.g. Fenpropidol, Fitalin, etc.). 2.Physical therapy: mainly including hot compresses, baking electricity, etc.. 3, functional exercises: including two aspects, usually after oral pain medication and physical therapy. (1) Strength training: the recovery of internal and external rotation strength is very important for the improvement of shoulder joint function. Two ways can be used: (1) external rotation: fix the elastic band (the tension should be about 0.5 kg) at the level of the wrist joint. The elbow is flexed at 90°, the upper arm is tightened at the side of the body and the forearm is rotated outward as far as possible. Internal rotation: fix the elastic band at the level of the wrist joint. With the elbow flexed at 90° and the upper arm tightened at the side of the body, try your best to rotate the forearm inward. (2) External rotation: lie on the side with the affected side on top. With the elbow flexed at 90° and the upper arm tightened at the side of the body, hold a heavy object (weight should be around 0.5 kg) and rotate the forearm upwards. Internal rotation: the affected side is on the lower side. With the elbow flexed at 90° and the upper arm tightened at the side of the body, hold a weight and rotate the forearm upwards. (3) Mobility exercises: the goal is to make the range of motion of the affected shoulder joint close to normal to avoid secondary frozen shoulder.