Don't assume that you don't need to worry about dehydration just because your face tends to be oily. As the cold wind picks up, more and more moisture is taken away from the skin, and no type of skin should let its guard down. Fortunately, the skin will remind you with different "expressions." Not letting the skin become "thirsty" is not only about preventing tightness, flaking, or excessive oil secretion, but it's also the primary task in preventing skin aging.