By Suzanne Dixon, MPH, RD. Updated June 27, 2016. Learn how to prepare for colon cancer screening during the day before your scheduled examination. The day before a colonoscopy, you will begin having only clear liquids, starting with either lunch or dinner.
In addition, UV light stimulates melanin cells in skin, causing them to darken; when this happens, you have a tan. Unfortunately, there is no such thing as a safe tan. The UV light that burns or tans you damages skin cells in ways that can accelerate skin aging, and even increase your risk of developing skin cancer. There are two kinds of UV light: Ultraviolet A (UVA) and ultraviolet B (UVB).
A sunburn is reddening of the skin that occurs after you are exposed to the sun or other ultraviolet light. The first signs of a sunburn may not appear for a few hours. The full effect to your skin may not appear for 24 hours or longer. Symptoms of sunburn are usually temporary. But the damage to skin cells is often permanent, which can have serious long-term effects, including skin cancer. By the time the skin starts to become painful and red, the damage has been done. Pain is worst between 6 to 48 hours after sun exposure.