Once a fistula is formed, there is very little chance of self-healing, and the complication of the fistula brings many troubles and certain hazards. The first is that the pus contaminates the underwear, and after strenuous activity can cause the pus to overflow, local irritation, skin friction, itching, very painful, affecting work and study, and over time can make the body weak and thin, mental discomfort, resistance to disease, anemia, and more frequent attacks, forming a mutual cause and effect. If not treated in time for repeated attacks, the pus can penetrate the wall and spread along the sphincter gap to form multiple, complex anal fistulas, which not only makes treatment difficult, but also affects the normal physiological function of the anus, endangers the surrounding organs, and has a tendency to become malignant.