Back pain in the middle of the right side of the back can be caused by the following reasons: first, herpes zoster, in the early stage of herpes zoster can appear on one side of the back pain, after the incubation period can have herpes, then to the dermatology department for early diagnosis and treatment. Second, intercostal neuralgia, intercostal neuralgia can appear on one side of the back pain, to early examination to diagnose, early nutritional nerve as well as closed treatment. Third, rib disease, when there are tumors and metastatic tumors in the ribs, there can be pain in the back of the ribs, which should be diagnosed by checking the CT and ECT of the ribs. Fourth, gallbladder disease, when gallbladder has cholecystitis, gallbladder stones, also can have the symptom of pain in the middle of back, for the radioactive pain, this time to check the gallbladder ultrasound, CT for diagnosis and treatment.