The symptoms of shoulder impingement syndrome are mainly as follows: First, during shoulder supination or abduction activities, it is easy to produce pain at the acromion area. Second, during internal and external rotation or forward flexion and extension of the shoulder joint, a gravelly sound can be heard with a stethoscope at the anterior or posterior border of the acromion. Third, localized pain can lead to a decrease in the strength of the shoulder joint in abduction and external rotation, making it impossible to complete the movement against resistance. Fourthly, during the usual activities of the shoulder joint, prolonged impingement may produce edema and bleeding in the soft tissues of the rotator cuff, or even tearing of the tendons, resulting in localized swelling, which can be checked by musculoskeletal ultrasound.