Try searching the boards on this site and the internet for something called Raynaud's Syndrome. It's fairly harmless, but it causes extremely cold hands and feet that blanch easily. I would also recommend that you post on the Skin, Hair, & Nails board, as I have seen posts regarding Raynaud's Syndrome and similar problems on that board. Persons on that board can also give you good tips on how to keep your hands better moisturized.
Good luck!