One in five Americans will get skin cancer in his/her lifetime. Actinic keratoses (premalignant lesions) are the most common lesions caused by the sun followed by basal cell carcinoma and squamous cell carcinoma each being well over 1 million cases annually. Basal cell carcinoma is the most prevalent skin cancer in young and middle-aged adults, however squamous cell has overtaken it in elderly patients who have an extensive sun exposure over their lifetime. The incidence of malignant melanoma has markedly increased over the last 30-40 years. A study of 1621 Australians found that regular use of sunscreens reduced the risk of malignant melanoma by 50-73%. In the US, people sitting on the left side of the car receive approximately 6 times the dose of UV radiation on the left side of the head, neck, arm and hand as compared to the right side. As would be expected there are more basal cell, squamous cell and melanoma skin cancers on the left side of the face and left arm due to driving. This can be lessened by regular sunscreen use.