Try doing a search on the boards and on the internet for Raynaud's Syndrome. It's a condition that causes extremely cold hands and feet. It's fairly harmless, but it causes extremely cold hands and feet that blanch easily. I think there are some treatments, such as iron supplements, that can often help. My fiance has it, and he's fine. Try mentioning it to your family doctor; he/she may have some information and tips for you. My fiance concentrates on never letting his hands get cold. Wear gloves, even when reaching into the freezer. Make sure you have warm gloves with thinsulate, or something similar, every time you go outside. Even in the summer, keep a pair of thin cotton gloves (like the kind women sleep in with moisturizer to soften their hands) in your purse or glove compartment in case your hands get cold (like in the movie theater, for instance). Try to never wash your hands in cold water, use lukewarm or warm. Keep your hands well moisturized. Beyond that, you'll have to see the doctor. I guess it's not all that uncommon, so the family doctor should be able to help you out! 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! :)