Really embarrasing question? (zits)?

Hi! :) Okay this is a really embarrasing question, but I was wondering how/if it's possible to get rid of severe back acne. I recently lost 100 pounds, (I was 210 and now I'm 110) so I'm feeling a lot better about myself, and I want to wear a swimsuit this year without a coverup. But the back zits make me feel soooo gross! What can I do? Thanks.