Perianal abscess is a disease that must be operated to cure. Generally, perianal abscess is about 7 days from the time when the anus feels pain to the time when the pus is formed. If antibiotics are applied at the beginning of the disease, the inflammation may be controlled at that time and a nodule is formed locally, and the local pain is not felt when the Chinese herbal medicine is applied externally, but when the body resistance decreases after stopping the treatment, such as a cold and fire, it will cause another attack of perianal abscess. If a perianal abscess breaks down and flows pus, the local mass will take a long time to slowly absorb because the opening is too small and the drainage is not good, forming a cord, which leads from the broken place to the anus, which is the formation of an anal fistula.