Back when I had perfect skin, I used to get a little acne if I were being lazy and forgot to wash out my powder puff. I mean I used to use any old makeup, I slept in my makeup...no acne, not at all.
In 1995 all of that changed. I was trying out a new birth control pill and didn't have health insurance, so I was trying to make it work, over six months...I had acne for the first time since adolescence (I was 29 at the time).
I've been acne prone ever since then. Going totally without makeup, made no difference to my acne. Putting on makeup, likewise made no difference.
I'm skeptical of claims that makeup or other topical products "break you out." If you had no acne before trying it, and returned to no acne after stopping using it, yeah, you can say that product broke you out. But people who had acne before, and still have acne afterwards...was it really that product that caused more acne? How can you tell?