Ok I will try to find it. I'm guessing it's a imbalance. I only broke out on my chin before I was pregnant now it side of my face and chin, shoulders, chest and I get more blackheads on my face then I ever have. It has improved on my face but now I have scars where the really bad pimples were. Sounds like you know alot about skin so please let me know if you have any other suggestions.