Go get your hormones checked. A testosterone imbalance may cause acne. And it's more than testosterone. If one hormone is out of balance, it can throw the whole thing off. PCOS can cause acne in women.
Here's an example: If prolactin levels are high, one will make "milk". But if prolactin levels are normal, one may still make milk if testosterone is too low.
Whenever something goes wrong with your body, realize that it's probably a *symptom* not the problem in and of itself. Yes, treat the symptom, but don't forget to look for the root cause. In the end, you may be right. Sometimes a cigar is just a cigar. But too many times it's is not!