There are many reasons for right shoulder blade pain, such as periarthritis of the right shoulder joint, skeletal muscle disease, right pleurisy, gallbladder disease and biliary tract disease. 1. Periarthritis of the right shoulder joint: also known as frozen shoulder, it is a sterile inflammation of the soft tissues around the shoulder joint, which occurs in middle-aged and old people, and mainly manifests as shoulder joint pain and activity limitation, and may also appear the symptoms of right shoulder blade pain. 2. Skeletal muscle diseases: such as right back muscle injury, right intercostal neuralgia, etc., may cause right shoulder blade pain. 3. Right side lung disease: when the right side of the patient has pneumonia, lung cancer and other diseases, and the lesion site is close to the back of the lung, or the tumor invades the tissues in the back of the lung, the right scapula pain may also occur. 4. Hepatobiliary diseases: such as cholelithiasis, cholecystitis, bile duct stones, liver diseases, etc., radiating right scapular pain may occur. In addition to the above causes, right-sided pleurisy, myofasciitis, cervical spine disease, etc. may cause right scapular pain. Therefore, when the symptoms of right scapular pain appear, it is recommended that patients seek timely medical treatment, improve relevant examinations to clarify the cause of the disease and then carry out targeted treatment, so as not to delay the condition.