There can be many signs including: a change in a mole, a sore that does not heal, a skin growth that increases in size, and a spot that continues to itch, hurt, scab.
People who always burn, never tan, and are fair with red or blonde hair, green or blue eyes and freckles have a greater chance of developing skin cancer.
Sun Protection Factor (SPF) measures the length of time a product protects against skin reddening from UVB, compared to how long the skin takes to redden without protection.
Do the sun's ultraviolet rays penetrate the window glass in your cars and at home?
Yes, they do penetrate. Windows and car windshields somewhat reduce exposure to ultraviolet B (UVB) radiation. Only car windshields are partially treated against ultraviolet A (UVA) rays. So, consider the use of a UV-protective window film on windows in your home and vehicles.