I have a pimple or cyst that keeps developing on one side of my rectum on the outside of the sphincter. Well it does get irritated or swollen, I squeeze it an puss comes put like a pimple. I have been to a colorectal specialist and he says it's just a pimple. But this thing-does not go away for years and is annoying. I did have fistula operation FYI. Before the sore/pimple gets big I do feel pain under the sphincter. What is this?
I doubt it's an STD.Is it an infected anal hair gland, if so what can I do?