You’ve said it before: “I need my beauty sleep!” as you crawl under the covers for a well-deserved full night of rest. But while you might be saying it facetiously, there areways to slow down signs of aging overnight. But first: doesn’t sleeping cause wrinkles?
Yes, it can. According to Debra Jaliman, MD, a New York City-based dermatologist and author of Skin Rules ($13; amazon.com), sleeping in such a way that your face comes into contact with cotton pillowcases like on your side or stomach can lead to the creation of deep sleep lines on your forehead and cheeks.
Wrinkles are caused by the loss of collagen and elasticity, which reduces skin volume. But applying repeated pressure (such as sleeping with the side of your face on a pillow) or muscle motions (such as laughing and squinting) against the collagen will promote its breakdown, eventually leading to visible lines.