Acne?

So I have horrible skin, like scars and stuff. i cover it all the time with makeup, and it's pretty much just on my forehead (also why I'm mistaken for having really good skin - the rest of my face is fine!) but for now it seems entirely out of control. The thing which sucks is that I have REALLY dry skin, and I can't handle acne at all even though I use very strong products. How do you take care of your skin? Also, do you have any tips? ...