The aging of this area is due to muscular hyperactivity, sun exposure, a progressive loss of collagen and elastin in the skin, and finally to a diminution of fatty tissue which further marks the bony reliefs (hollow temples, accentuation of the glabella).
The forehead is evaluated by taking into account the regional anatomical specificities, responsible for expression lines that can appear as early as the twenties (forehead wrinkles, frown lines) in men and women.