Wrinkles are lines, creases or folds in the skin. There are two types of face skin wrinkles – dynamic wrinkles and static wrinkles:
Dynamic wrinkles are lines, creases or folds that are caused by the pull of the facial muscles during repeated facial expression. Examples of these include forehead lines, frown lines, crow’s feet, and smile lines. These wrinkles are seen with movements of the face during emotion.
Static wrinkles are lines, creases or folds in the facial skin seen when the face is at rest and not moving. Static wrinkles can be caused by sun damage, skin ageing, smoking and by long term dynamic lines that become permanent.