My face Skin is very dry and Dull compared to other body parts. I use Sunscreen then also it doesn't improve. I had vitamin C tablet's course for six months but it was also not working, When I used "skintight" cream containing Hydroquinone and tretinoin, it was very effective to my skin but after use of two months my skin started to become dry again and Blackening the circles near nose. So I discontinued the use. Problem exists as same Actually when I remove my shirt it is very different than face color. When I don't go in to the sunlight then also My skin becomes black. It's actually Challenge for all good Doctors.