Faded White Spots on Computer Screen?

Recently I've noticed white spots on my laptop screen. They're not solid white but defiantly washed out. At first it was in one spot that ended up growing and I thought it might be dying pixels but the original spot has since gone away (then reappeared then gone away again) and new washed out areas have shown up. They change every time I turn the laptop on. Any ideas on what it could be and what to do about it? The laptop is only two years old so I don't think I should be having issues out of it yet.