My 6 year old has it too, all over face, arms, and upper thigh area. It's just one of those things...you just have to not fuss over it. If you do, you may create a self consciousness over it. I try to keep lotion on him, but no matter what, he's flared up. I have made an appointment with a dermatologist once a year basically just to see if anything new has come out as a fix for it, and every year she says the same thing...."some people find that certain things work, some people find that nothing works."
I have tried stuff called KP Duty, which if you google it, I'm sure you'd find the website it's from. The bottle is white with purple and has a drawn picture of a girl on it. Anyway, the thing is, it's not FDA approved, but it really does smooth out the skin. I don't use it very much because my son complained of it stinging when I first got it and had used it everyday on him. But, it DID make his skin smoother. I've recently started using it again, maybe once or twice a week, and I do notice a difference, but I'm a little reluctant since I've learned it's not good to try non FDA approved things. I didn't really think about it when I bought it 3 or 4 years ago.