Anal fistula is an abnormal tunnel that starts from the anal canal and ends in the skin near to the anus.
- This is a very rare condition that is seen only in very few people in India.
- This canal is mostly infected, i.e it is filled with abscess(collection of puss surrounded by an inflamed tissue).
- This puss is formed as a result of a bacteria or faecal matter clogging the anal canal.