Tmi but help😩😂

If you get offended by seeing an Ass please just don’t click on the photo. I have realised I’m starting to get these spots on my ass cheeks..I don’t sweat loads and change my underwear/clothes atleast twice a day..I also shower daily. What could be causing this and what helps this? It’s so embarrassing because my boyfriends favourite thing about me is my ass and right now it’s a spotty unattractive

[Photo removed by Glow]