Back pain to go to what department, to specific problems specific analysis: First, cardiovascular medicine, pain and activity related, activity can appear, rest or nitroglycerin can relieve. Normally there is hypertension, high blood pressure, high blood pressure, high blood sugar, consider the cause of the heart, to see cardiovascular medicine. Secondly, orthopedics, if the pain is not related to the activity itself, but is related to the specific position of the upper limb and causes limitation of the upper limb activity, it is considered to be frozen shoulder and needs to be seen in orthopedics. Third, cardiovascular surgery, if the pain in the back is tear-like pain, which can be accompanied by particularly high blood pressure, and the blood pressure of both upper extremities is also asymmetrical, consider aortic entrapment, and need to see cardiovascular surgery. Fourth, dermatology, if the back pain is accompanied by local skin herpes, consider it to be viral infection caused by herpes zoster, need to see the dermatology department.