I want to wear a bikini but I have bumps on my butt. Will a loofa help?

Folliculitis. You likely have mild bacterial folliculitis (infection/inflammation). This problem can be treated using over-the-counter benzoyl peroxide cleansers and leave-on products. However, benzoyl peroxide bleaches clothing and sometimes hair, so be careful about the leave-on products so as not to ruin your clothing. I suggest applying and night and wearing white pjs and underwear.