Recently I developed an itch around my anus and ignored it thinking it'll go away on its own. That same day while in the shower washing I found a puffy bump where the itch was, I've been checking the bump and it has only gotten worse, now there are more red little itchy irritated bumps and it itches/hurts most when I'm laying down or have been sitting for a long time. It hurts to go #2 and hurts when I wipe, I have experienced pin worms and know this isn't that, I know I do not have stds, I Am often constipated, I am sexually active and do shave, could this be pimples or ingrown hairs ? Is it a bacterial infection? What is this rash? How did I get it and what do I need to do to get rid of it?