I love this stuff. I was extremely skeptical, but it totally works. Even on cystic like Acne. I'm not sure that's what it was but it definitely reduced it. The key is to apply often as soon as possible, and don't get lazy. When it starts going away, keep applying it. As long as your skin isn't too sensitive, I have VERY VERY sensitive skin and this doesn't make me dry, just red when applied to existing acne. I suppose if it hurts, it's working? Not sure, but I will buy this again! One bottle looks like it will go A LONG way!