Pus flowing from the incision after appendectomy indicates infection and septicemia in the post-operative appendectomy incision. The traditional appendectomy is an appendectomy with an oblique incision in the right lower abdomen at the location of the McKay’s point, and sometimes a transrectal incision is also made. Since the appendix is an inflammatory disease, pus or bacteria on the surface of the appendix may contaminate the wound during surgery, so the wound may become infected after surgery, which may manifest as localized redness, swelling, nodules, pain, and sometimes even suppuration. If the appendiceal wound becomes infected or purulent, the sutures should be removed promptly, the wound should be opened and drained, the wound can be cleaned with hydrogen peroxide, and the wound should be filled with iodophor gauze, and the dressing should be changed intensively.