I find it difficult to explain. I'd say, the is a dull ache/pressure that is always present. I feel that is at the bottom, but internal. It does but feel like an inflammation.
During and immediately after BMs, that dull feeling is amplified to a much more throbbing like pain, both internally, as well as right at the anal opening (I think). It's such an obnoxious feeling, that is hard to pinpoint. Also at that time, it actually pains me to sit on the toilet. That feeling is more of an ache, and it's like it surrounds the anal opening (including my "cheeks").
At this point, I can only sit a few minutes, which is probably better off. Once I get up, I need to lay a few minutes for everything to calm down, and I've been using a heating pad to assist. And then it's back to the always present dull ache.
It was a momentary relief when passing that gas, but quick. Otherwise I've been having to lay face down and contort my body to get gas out. And even that type of pushing is irritating.
I'm sorry for the lousy explanation, just hard to explain.