What are wrinkles and what causes them?
Static lines, or fine lines that are visible on the surface of the skin at all times even without facial expression, is a result of dry and damaged skin, that has lost its intrinsic elasticity, and ability to retain moisture.
Dynamic wrinkles, or lines that appear with facial expression, such as frown lines, forehead lines, and crow’s feet, are due to over-activity of the small facial muscles responsible for the corresponding facial expressions.
Dr. Felix Li
9 April 2019