What to do about re-appearing cystic acne?

Last week, my cheeks were getting so much better. They were almost fully clear on my cheeks. I was really happy and thought my new regimen for my skin was working. Couple days ago, I started breaking out again in the cheeks. I have cystic acne on my cheeks again! Ugh! I stopped wearing makeup. I'm not sure if that will make a difference. I'm just sick of healing my cystic acne and having relief for a couple days and then it reappearing in the same areas on my cheek!