Right subscapularis pain is mainly caused by right subscapularis bursitis, myofasciitis, costochondritis or intercostal neuritis, right lung disease, cervical spondylosis and gallbladder disease. 1. Subscapular bursitis of the right scapula: it is especially common in patients with too frequent activities of the right upper limb, manifested as pain under the right scapula with popping sound, which is more obvious when the shoulder joint is active, and localized bursa formation can be seen through ultrasound examination. 2. Myofasciitis: it is mainly common after localized cold or flu, manifesting as soreness and pain under the right scapula, weakness, turning over and right shoulder joint activities are affected. 3. Costal chondritis or intercostal neuritis: right costal chondritis or intercostal neuritis will lead to pain and discomfort under the right scapula, which is a chronic persistent dull pain, obvious at night, and aggravated by coughing and deep breathing. 4. Lung disease: commonly found in the lower lobe of the right lung, inflammation or tumor can stimulate the right pleura, resulting in pain under the right scapula, accompanied by coughing and sputum, CT examination can be clear. 5. Cervical spondylosis: when the spinal nerves on the right side of patients with cervical spondylosis are compressed and stimulated, it will be reflected to the right side of the thoracic back, causing pain under the right shoulder blade. 6. Gallbladder disease: abdominal pain and discomfort may occur after eating, which may radiate to the back of the right shoulder and cause obvious pain under the right shoulder blade. There may be other reasons for the pain under the right shoulder blade, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.