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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.
If you are worried about this condition you can try our free AI Symptom Checker here.
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.