Skin aging can be caused by intrinsic factors or extrinsic factors. Intrinsic, biological or internal aging is basically the natural aging of the skin. The way it ages is programmed in the genes and therefore it is inherited. Extrinsic or external aging is caused by external factors such as the sun and the environment. There is no need to hide from the facts. The more you know, the more you can proactively take charge of your skin’s aging appearance.