What are wrinkles and how are they formed? The lines that are seen between the brows or the smile line near the mouth or the lines on your forehead are actually result of muscle movement, your facial muscles contract, cause a folding of the overlying skin. With passage of time and ageing, our cells take longer to regenerate and our dermis (the inner skin) starts to thin. We also produce less collagen, elastin and Hyaluronic acid, natural substances that give our skin the structure, stretch and volume. There are also hormone changes, damage caused by free radicals and so on. As a result the skin loses its elasticity, sags and forms furrows and wrinkles/lines. Fortunately now we have Botox to treat them