A dermatologist would be able to help. What cured mine was when I realized I had a sensitivity to orange juice. When I stopped having oj every morning for breakfast, in a couple weeks, no more acne. So it is possible that it is diet related.
Have you tried the Clearskin Professionals Acne Clearing Kit from Avon yet? I love it and its made more of a difference than anything else I've tried and trust me I've tried it all! The Anew Retexturizing Peel along with the kit had my skin completely clear in a couple of weeks time and its stayed that way for a year now. If you want to check them out go to www.youravon.com/dhullum and if you want to try the trial kit or the peel use coupon code fsany for free shipping on anything you buy. Hope that helps you out!