Coarse wrinkles are deep wrinkles that are always present, even if the face is at rest.
There are two types of facial wrinkles: dynamic and static.
Dynamic wrinkles appear temporarily when a muscle contracts and causes the overlying skin to crease.
Static wrinkles are always visible, even when all the facial muscles are resting, but become more obvious
with facial expressions.
Static wrinkles tend to develop in skin that is thinned and stretched as a result of premature or natural
ageing processes, and are more pronounced in UV damaged skin.