Dark skin in my butt🤕

Hey girls! I'm having big trouble with my buttcheeks because I kinda of have a big butt and sometimes I get these pimples or acne on it and then it leaves me like dark spots, dark skin. I hate seeing my butt like that all the time, I wouldn't like my boyfriend to see my butt like this🤕 I want my butt to look cute haha:( have this happened to you before? If so, what can I do? Some cream or medicine y'all recommend? Please help me😪