Avoiding this is really easy, it can be done by wearing sunscreen everyday and covering the skin with clothes or hats.
According to studies, each time a facial muscle is used, a groove forms under the skin.
Facial expressions, like frowning, squinting or smiling repeatedly, can lead to fine lines. This is because skin springs back when a person is young, but this action becomes harder as the skin looses flexibility, making older skin get more permanent grooves.
Smoking regularly is one of the causes of skin ageing, as it reduces the blood supplies to the skin. Drinking alcohol also brings consequences, it dehydrates the skin, making it more likely to wrinkle.