Haemorrhoids, also known as piles, are swellings containing enlarged blood vessels found inside or around the bottom (the rectum and anus).
More information on Piles is available here.
An anal fistula is a small tunnel that develops between the end of the bowel and the skin near the anus (where poo leaves the body).
More information on Anal Fistula is available here.
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.