Many facial wrinkles occur when we use our muscles to form facial expressions. The wrinkles formed during these expressions are called dynamic wrinkles. Let’s say, when we smile, our eye wrinkles that become prominent. When we frown, the vertical lines between our eyebrows become noticeable.
When we are young, our skin springs back to its initial position after facial expression, but as we get older dynamic wrinkles remain on the skin to form static wrinkles; these are the wrinkles and folds that are present at rest. The process occurs because the natural substances such as collagen (the major structural protein in the skin), elastin (the protein that causes tissues to stretch) and hyaluronic acid (that gives volume to the skin) decrease with age.
This together with environmental factors, such as exposure to sunlight, smoking and stress all contribute to the creation of wrinkles and folds.