Anal fistula should be surgically treated in a timely manner and cannot be ignored for the rest of your life, because long-term failure to treat anal leakage can produce a series of hazards: 1. Infection and pus: anal fistula infection and inflammation increases anal pain, and pus flows horizontally after ulceration, contaminating the perianal skin, stimulating itchy perianal skin; 2. Anal incontinence: anal fistula is not treated for a long time and allowed to develop, causing serious damage to the sphincter muscle, leading to anal incontinence and other Complications; 3. increase in fistula and fistula: repeated attacks of anal fistula lead to the creation of complex anal fistula, which makes treatment difficult and affects the physiological function of the anus; 4. decrease in physical fitness: repeated attacks of anal fistula can make a person weak, mentally unstable and resistant to disease. 5. risk of malignant transformation. The multiplicity of anal fistulas, especially rectovaginal fistulas, rectourethral fistulas, and high complex anal fistulas have the tendency to become malignant.