Fine lines are small and shallow lines that appear on the face, this is normally an indicator of first signs of ageing. … Fine lines turn into wrinkles as you age – this is because the collagen and elastin beneath the surface of your skin begins to break down
Repeated facial expressions. Facial movements and expressions, such as squinting or smiling, lead to fine lines and wrinkles.
Ultraviolet radiation, which speeds the natural aging process, is the primary cause of early wrinkling. Exposure to UV light breaks down your skin’s connective tissue — collagen and elastin fibers, which lie in the deeper layer of skin (dermis).