These changes may take many years of exposure but when they occur, the damage is irreversible. If exposure to sunlight continues for several years, the damaged skin has an increased chance of developing one of the forms of skin cancer. High levels of chronic exposure, such as working outdoors, is more often associated with squamous cell tumours. Skin cancer among people who are sensitive to sunlight is more common in regions with stronger sunlight. People with genetic diseases that make them more sensitive to sunlight have a greater chance of developing skin cancer.
Studies show that ultraviolet radiation similar to sunlight causes skin cancer in animals.
Basal Cell Cancer Basal cell cancer is the most common of all cancers in North America and Europe. It is usually found in areas of the skin exposed to sunlight, but sometimes occurs in other areas as well. This type of skin cancer appears as a raised, hard, red or red-grey, pearly wound often found on the forehead, eyelids, cheeks, nose, and lips. Although there is always a chance it could become serious, basal cell cancer usually does not spread. Most cases are easily treated and cured.