The pain under the back shoulder may be caused by the following reasons: firstly, the disease of ribs, when there is tumor or metastasis in the ribs, the pain of ribs under the back shoulder can appear, then we should take CT and ECT examination of ribs at an early stage to diagnose and treat at an early stage. Secondly, herpes zoster, in the early stage of herpes zoster, there can be pain under the back shoulder, which can be hidden pain and tingling, and herpes can appear after the incubation period, and then it should go to dermatology department for diagnosis and treatment. Third, intercostal neuralgia, intercostal neuralgia can occur in the back of the shoulder below the intercostal nerve pathway pain, this time to early diagnosis of physical examination, early nutritional nerve and closed treatment. Fourth, lung diseases, when there are tumors and inflammation in the lungs, pain under the shoulders of the back can occur, then we should carry out lung examination for early diagnosis and treatment.