With age, our skin starts showing some signs of ageing, like wrinkles, steadiness loss and expression lines. These expression lines result from facial muscles action, being that, the intensity of use of these muscles changes from one person to another.
Like joy, feeling manifestations such as sadness, anger and surprise stay stamped our faces due to muscular contractions. Ageing and the repetition of these facial movements enhances the appearance of expression lines and wrinkles.