The smile is an expression of positive emotions. Unfortunately, it also causes wrinkles.
Three types of smile lines exist :
– Crow’s feet wrinkles, at the outer edge of the eye.
– Naso-labial (nose to mouth) folds which go from the outer edge of the mouth to the nose.
– Clawed or crepey cheeks. Facial expressions make the muscles tense and de-contract, and consequently lead to lines. For example, when we smile, lines extend across the face, up to and including the crow’s feet. In our youth, these are only visible when we really beam, but they become permanent.