An appropriate amount of pig hair. Wash clean, remove impurities, then stir-fry in a pan until carbonized. Grind into fine powder and store in sealed bottles. When using, first clean the affected area with saline solution, let dry, then sprinkle the pig hair charcoal powder directly onto the ulcer. Change dressing once daily.
Alternatively, mix with sesame oil to form a paste and apply directly. Treats skin ulcers that fail to heal. With this method, most cases recover within about 10 days.<Ulcer>