NSFW: buttocks questions

About a year or two ago, I tried anal sex and after that day, my butthole didn’t look “normal” again. There’s something like hanging out from outside the anal, like I tried sticking it back in but it keeps coming back out.

It does not hurt to use the bathroom or hurts when I sit. There is no blood or pain at all in anyway or form. It’s just looks weird to me.

Is there a name to this “cause”?

Is there a treatment or something?