3.Cause: Sun
You need some sunlight, but too much ultraviolet (UV) light from the sun can damage collagen in your skin. This causes your body to produce too much abnormal elastin. If this happens over and over, your skin may start to thicken. It will develop a rough feel with deep wrinkles and varied color (age spots). Your doctor might call this process solar elastosis.
4.Cause: Smoking
It’s the strongest predictor of wrinkles, besides your age. Tobacco narrows the tiny blood vessels in your skin, which lessens the flow of essential nutrients like oxygen. It also seems to slow the rate at which your body makes collagen. The repeated tensing of the lips to draw smoke can cause extra lines around the mouth. As it does with too much UV light, your skin gets early lines and wrinkles and a leathery feel.
