The skin on your nose is quite different from the skin on your knees or the soles of your feet. There are more oil glands on your face, chest and back than other parts of your body, for example. So, when you’re battling dry skin, you need to choose your weapons wisely -- based on the area you’re trying to hydrate. “The drier your skin, the thicker the cream you use should be,” says Barbara R. Reed. M.D., clinical professor of dermatology at the University of Colorado Hospital in Denver. “Lotions are usually thinner than creams, and rub in faster, but they don’t stay on the skin as long .” Here’s a guide to undoing dryness from head to toe.