Skin cancer from the sun- sun exposure, sun damage and sunburn are all caused by the harmful Ultraviolet (UV) rays that come from the sun. Most skin changes considered a normal part of ageing are caused by the sun. Over a period of time the ultraviolet (UV) light produced by the sun damages elastin (fibers in our skin). When these breakdown our skin begins to sag, stretch and lose the ability to get back in place after stretching. Sun damage also makes our skin bruise and tear more easily and it also makes our skin take longer to heal.