Dry Skin; HELP?

I have NO make-up experience, and I know NOTHING about any type of make-up! I only wear a powder foundation, and a little lipstick; I also style my brows a little bit and curl my lashes. Anyway, no matter what type of foundation I use, (powder or liquid), I have really dry, flaky patches on my forehead, nose, and right on top of my eyebrows. I do use a pretty expensive powder foundation from QVC and overall, I think it looks good.. aside from the dry patches. Any advice on how to fix this would be GREATLY appreciated! Thanks!