The surgical steps for onychomycosis include disinfecting and draping, anesthesia, incision and drainage, and dressing. Inflammation of the nail groove is an infection of the nail groove and its surrounding tissues, and the causative organism is mostly Staphylococcus aureus. When there is abscess formation in the nail groove infection, surgical treatment is required. First, the skin around the wound is disinfected with iodophor, a total of three times, to an area of 15 centimeters around the wound, and after disinfection, a sterile cavity towel is laid down. After spreading the towel, local infiltration anesthesia with lidocaine is applied to the root of the affected finger to ensure anesthesia effect. After anesthesia, a longitudinal incision is made in the nail groove to drain the wound. If the infection has already involved the subcutis, an incision can be made on both sides to drain the wound, and then petroleum jelly gauze is placed to drain the wound. If pus has accumulated under the nail bed, the nail needs to be removed, and the wound should be washed well with sterile saline. After incision and drainage, the wound should be dressed with a dressing, etc., and the dressing should be changed regularly.