why is my skin wrinkling up
Leading Cause of Wrinkles: Sun Exposure. A healthy tan is anything but. Tanning is a sign of skin damage, evidence that the sun's ultraviolet rays have penetrated and damaged the skin's support structure. Most wrinkles are caused by sun exposure throughout life -- and it's never too late to halt the process. What you can do: Wear sunscreen with sun protection factor (SPF) of at least 15.