“Sleep position can affect facial wrinkles, especially on the side of the eyes ('crow’s-feet') and on the forehead,” says Jeffrey Spiegel, MD, facial plastic surgeon and founder of Advanced Facial Aesthetics in Boston. “It happens when the skin of the face is pushed by our pillows (or arms) into a forward position. The longer you sleep this way, the more likely it is that these wrinkles will become permanently etched into the skin.” The best way to prevent this is to sleep on your back. “This allows the skin to sit in its most natural position, and you can place another pillow under your knees for added comfort.” Photo: Thinkstock