Fraxel--are Red Patches Normal After Treatments?

I had my third Fraxel treatment three weeks ago, and one area on my cheek is kind of blotchy, and another is slightly reddish, about half an inch, and it just wouldn't go away. It looks simply irritated (even though it isn't) and appears to just be on the surface. Is this normal in collagen regrowth? And what other treatments can be used to even out the skin tone, if need be? Thanks.