My Ass Crack Felt Itchy And Crusty And After Showering

My ass crack felt itchy and crusty and after showering and cleaning with wet toilet paper, I saw no poop. And I looked at it in the mirror and all the skin looks red so I think it is irritated. And I though t all my anal hairs could have possibly been tangled but I feel like I didn't wipe enough or I wiped too much either way my ass smelt like shit all day today at school and currently my ass feels crusty so I think I have some type of rash currently in my ass.