This study tests whether a traditional Chinese herbal bath called Tongyangxiao (TYX) lotion helps surgical wounds heal faster in patients who have had anal fistula surgery. Anal fistulas are abnormal tunnels near the anus that often require surgery, but the wound is usually left open and heals slowly. The study compares TYX lotion with a standard antiseptic bath (potassium permanganate). Patients use one of the two baths once daily for 14 days after surgery. The main goal is to see how long it takes for the wound to close completely. The study also measures pain, wound size, inflammation, and proteins involved in healing. A total of 115 patients took part, and laboratory experiments with human skin cells were also performed to understand how TYX works.