I have acne on my ass?

This is embarrassing to talk about so that’s why I’m asking here lol. Well I have struggled with acne before as a teenager. I’m talking horrible cystic acne. I went to a dermatologist when I was 16 and with medication we were able to clear it all. I’m now 20 and I haven’t had any problems with my face acne since then, and I’ve never had any chest or back acne. But I’ve been having pimples on my ass for a while. They aren’t horrible, but it’s embarrassing enough for me not to want to do doggy style with the lights on.

Has anyone else ever had this before? How do you get rid of that? Thanks.