The anal fistula is caused by an anal gland infection, a common anal disease formed after the perianal abscess breaks down, after half a month to three months. Anal fistula patients can not eat the following foods: 1, with the disease of anal fistula, whether or not to do surgery, must pay attention to avoid eating cold, spicy and other irritating food; 2, anal fistula and poor bowel habits have a lot to do with diarrhea and constipation are not good, pay attention to keep the stool smooth, if there is diarrhea, pay attention to limit the intake of dairy products and soy products, it is best to avoid dairy products and The intake of soy products may aggravate the diarrhea; 3, attention should be paid to avoid drinking alcohol, alcohol is also one of the main triggers for the aggravation of anal fistula; 4, if surgical treatment is required, attention should be paid to avoid eating food with seeds before surgery, otherwise the intestines are not easy to excrete clean, which may affect the surgical results.