A fistula is a type of connection that is been made between any of the two body parts or the vessels, which is completely abnormal. The fistula can occur anywhere like between the rectum and vagina or skin and intestine etc. This disease is commonly found around the area of the anus and is properly known by the name of anal fistula. The fistulas usually occur due to some surgeries or injuries. Due to this disease, there can be persistent drainage in the body part which can further be cured only by the proper surgery.