For a natural exfoliator, I had always used a mixture of brown sugar and water. It works great for acne. I used to have a lot of trouble with severe acne. I also liked the Biore brand set they have for acne treatment.
What really helped me was buying a face mask specific for fighting acne. A lot of them will smell like sulfur and make your face smell a little like it too, but they worked really well for me.
I haven't actually tried it, but I have heard that Perricone MD has a really good line for acne, though it's a lot pricier.
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