When your skin turns red from too much sun exposure, you know you're in for a painful ride. Sunburn can be prevented by applying sunscreen regularly. However, if you fall asleep before re-applying, you may end up with a dangerous burn. The UV rays from the sun can mutate your DNA, causing skin cancer. To prevent skin cancer, your skin should start to peel. It may take a few days, but once your skin peels, the dead, damaged cells leave your body and your body begins to repair itself. -------------------------------------------------- Follow BI Video on Twitter: http://bit.ly/1oS68Zs Follow BI on Facebook: http://bit.ly/1W9Lk0n Read more: http://www.businessinsider.com/ -------------------------------------------------- Business Insider is the fastest growing business news site in the US. Our mission: to tell you all you need to know about the big world around you. The BI Video team focuses on technology, strategy and science with an emphasis on unique storytelling and data that appeals to the next generation of leaders – the digital generation.