Neck lines can appear commonly as part of the natural ageing process, and are usually defined by wrinkles and sagging skin, due to a loss of elasticity. As we get older, our natural skin cell turnover decreases and the collagen that you naturally produce depletes.
These ageing wrinkles on our neck usually appear horizontally. However, we may also find vertical neck lines. These are caused by keeping your head in the same position over long periods of time.