The right side of the back pain generally has the following causes: First, myofasciitis. When myofasciitis occurs, there will be pain on one side of the back, usually located around the scapula, can be accompanied by numbness and weakness of one upper limb, especially at night when the pain is more obvious, common after prolonged exertion and cold wind and appear. Second, it is not a reflex pain caused by gallbladder disease. When cholecystitis or gallbladder stones appear in the gallbladder, the pain in the back of the right shoulder will appear reflexively, so ultrasound and CT examination should be performed to rule out whether it is cholecystitis or gallbladder stones. Third, is it the early stage of herpes zoster, in the early stage of herpes zoster will also appear back pain, after the incubation period will appear clusters of blisters, to the dermatology department to further confirm the diagnosis and treatment. Fourth, is it a disease of the rib cage itself, such as a tumor of the rib cage or a metastatic tumor that causes back pain.