What are the complications of anal fistula? The fistula is a fistula-like tissue in the anus that secretes a lot of secretions like a puss and has bleeding symptoms, making it very uncomfortable for the patient. The actual fact is that you can find out what complications there are. The first is to contaminate the underwear, the second is to infect the skin, after friction and stimulation, itching and pain will appear one after another. In this way, work and study will be paralyzed, the body and spirit will also decline. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. 4, endangering neighboring organs: anal fistula is a multiple disease, long delay can form a rectovaginal fistula, rectal urethral fistula and rectal bladder fistula, so that endangering the surrounding organs is inevitable. In addition, if it is not healed for many years (meaning not completely cured), the possibility of malignant changes will be high.