An anal fistula is a small channel that develops between the end of the bowel, known as the anal canal or back passage, and the skin near the anus.
Our Health A-Z contains more information on Anal fistula.
Haemorrhoids, also known as piles, are swellings containing enlarged blood vessels found inside or around the bottom (the rectum and anus).
Our Health A-Z contains more information on Piles.
Important: If you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.