A sore on the back should be a case of an apparent bacterial infection on the back. In this case, the patient should first visit the dermatology or general surgery department of a regular hospital to have the doctor assess the exact condition of the sore that occurred on the back. If the local sore is not very large and the inflammatory infection is not very serious, it can be controlled with oral, topical or intravenous antibiotics; if the local wound is large and the local septicemia is serious, the wound can be cleared, drained or disinfected. Patients can’t treat the wound on their backs more effectively at home by themselves, and after the doctor treats the wound effectively, they need to determine whether it needs to be changed, cleaned, disinfected and bandaged again.