It's painful when I contract that area, but I didn't feel any lump near the opening of my sphincter. This small pimple is near
towars my tail bone opening, but still near
my anal area.
I am afraid it being some kind of STD, as I had unprotected oral sex. I tested for HIV, and came out negative. Around this time, I had very minor body ache, and fever. It's been about 3 weeks since. I looked at STD pictures and it doesn't look anything like it.
What could it be?
What can I do?