Phototrauma prevention.

In response to an alarming increase in skin cancer rates, much work is being done to find causes, identify populations at risk, and appropriately modify behaviors and protective strategies. The causes of nonmelanoma and melanoma skin cancers are multifactorial; however, the evidence implicating ultraviolet radiation as a major factor is mounting. Sunlight consists of four important wavelengths. Two of them, UVA and UVB, are the most harmful because they cause direct cellular trauma and immunologic suppression. Sunburn is a delayed prostaglandin-mediated erythema that implies severe damage to DNA in a cumulative fashion. Avoidance recommendations include activity planning strategies, apparel choices, and sunscreen use. Clothing is generally protective and hats should cover highly exposed areas. Special apparel products incorporate UV protection into the fabric and offer an additional strategy for workers and enthusiasts who frequently venture into the outdoors. A sunscreen is a topical agent that provides protection against UV radiation. Specifics of sunscreen classification and labeling by the Food and Drug Administration are covered in this article, along with selection and application strategies for outdoor adventurers and travelers. Whereas ultraviolet radiation avoidance and sunscreen use are vital, public education will remain the cornerstone of an effective plan to reduce skin cancer rates.