What causes anal fistulas?

Usually they are the result of anal abscesses.They may be caused by appendiceal abscess (as with appendicitis), diverticular abscess (a complication of diverticulitis) or Crohn's disease (an inflammatory disease of the small bowel and rectal area). You may have difficulty treating it yourself. If you see aphysician, it should probably be a general or a colorectal surgeon.

Here's a link: http://www.mayoclinic.org/anal-fistula/

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