Still, one-third of all adults sunbathe even though they know that sunlight can hurt their skin. You can delay these changes by staying out of the sun. The breakdown of these fibers causes the skin to sag, stretch, and lose its ability to snap back after stretching. The skin also bruises and tears more easily and takes longer to heal. So while sun damage may not show when you're young, it will later in life.
Nothing can completely undo sun damage, although the skin can sometimes repair itself.
So, it's never too late to begin protecting yourself from the sun. Smoking People who smoke tend to have more wrinkles than nonsmokers of the same age, complexion, and history of sun exposure. The reason for this difference is unclear. It may be because smoking interferes with normal blood flow in the skin. Skin Cancer Sun damage also causes skin cancer.