Embarrassing but needs to be asked

Alright ladies....for the past year since I came off the pill I've had some issues with facial acne. It's improved a lot, but unfortunately now I get random red bumps on my butt. They don't hurt or itch and they don't have a head or anything. It's almost like my skin back there is just super sensitive and anything irritates it. They usually go away in a couple days but then they'll randomly come back. I hate it soooo much bc I never want to sleep naked or shower with my husband bc I'm embarrassed. Its starting to interfere with my sex life bc I say no to sex bc of them. Please help!!!! 
Any recommendations on what I can do?? I shower at least once a day and exfoliate back there with a wash cloth.