Most skin cancers are caused by too much exposure to ultraviolet(UV) rays. Much of this exposure comes from the sun.

Ultraviolet Radiation

Ultraviolet (UV) rays are a form of invisible energy that is given off by the sun. The two types UV rays that are damaging to us are UVA and UVB. Both are found outside even on the cloudiest days.

UVA and UVB rays are responsible for the damaging effects of the sun on the skin. Over-exposure for many years, especially in children, can increase a person's risk of developing skin cancer in later life. Skin cancers affect people of all skin types and can also develop on people who do not have a history of severe sunburn. A person's cumulative exposure to UVR along with the number of severe sunburns they have received, especially during childhood, increases their risk of developing skin cancer.