Chest wrinkles are a normal part of aging, but their onset can be slowed or stopped by taking proper care of your skin and changing the way you sleep at night. Sleeping on your side causes creases to develop on the sides of your chest and in between your breasts. As you get older, these creases become more prominent and linger for longer periods after waking. As your skin loses elasticity over time, it takes longer to return to its normal, smooth condition in the morning, according to the American Academy of Dermatology.
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Apply moisturizer to your chest before you go to bed each night and again when you wake up in the morning. Dry skin is more likely to wrinkle, notes MayoClinic.com.
Train yourself to sleep on your back if you are a side- or stomach-sleeper. When going to bed at night, lie on your back and place pillows down both sides of your body. You will adjust to sleeping in the new position over time, and you can then remove the pillows.
Try lining your body with taller or harder objects, such as a partially full laundry basket, if pillows do not prevent you from rolling over in the middle of the night.
Place a pillow under your knees to help align your spine and prevent lower back pain. Although back-sleeping helps prevent chest wrinkles, it can strain the muscles, nerves and joints in your back.