There are several common causes of pain in the left and right shoulders when pressing: first, periarthritis, adhesion formation in the soft tissues around the shoulder joint, resulting in inflammatory reaction causing shoulder pain symptoms, preferably in middle-aged women around 50 years old, with the clinical manifestation of pain in the shoulder when pressing, limited active and passive activities, and a significantly narrowed range of motion of the shoulder joint. The treatment method can choose self rehabilitation training, or under general anesthesia shoulder joint manipulation release surgery. Secondly, subacromial impingement syndrome, if the acromion develops into type II or type III, it will be abraded and impinged with the greater tuberosity of humerus when lifting the shoulder, causing subacromial inflammatory reaction leading to shoulder pain, and the pain symptom will be aggravated by pressing hard, and the treatment methods include shoulder braking, rest, physiotherapy, local closed injection treatment, shoulder arthroscopy and acromioplasty.