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Health
Skin Cancer occurs mainly in people with fair skin, light eyes, and those who tend to freckle or burn easily during and after exposure to the sunlight. A history of 3 or more sunburns, particularly blistering sunburns (before age 20) greatly increases risk. A history of severe sunburns in childhood and adolescence may actually double the risk of melanoma in adulthood.
Ultraviolet (UV) radiation from the sun is the main cause of skin cancer. Energy from the sun actually is a form of radiation. It consists of visible light and other rays that people can't see. Invisible infrared radiation, for instance, makes sunlight feel hot. UV also is invisible, and causes sunburn and sun tan. UV rays damage DNA, the genetic material that makes up genes. Genes control the growth and overall health of skin cells. If the genetic damage is severe, a normal skin cell may begin to grow in the uncontrolled, disorderly way of cancer cells. UV also can cause sunburn, and other damage that makes the skin look prematurely old and wrinkled. |
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