When I got home last night after helping my friend I went to the bathroom and the back of my underpants was all bloody, surprising the hell out of me especially since I wasn't in any pain. I threw my underpants in the washing machine. I couldn't figure out why my ass was bleeding but it stopped by itself so I'm not going to go to the doctor. If it hurts or bleeds again I will go. I think my hemorrhoids were just acting up.