Sunburn is a clear sign that the DNA in your skin cells has been damaged by too much UV radiation. Excessive ultraviolet (UV) radiation from the sun or sunbeds is the main cause of skin cancer. Check out this new animation from Cancer Research UK to see exactly what sunburn is and how it increases your risk of skin cancer. Find out more at cruk.org/sun Follow Cancer Research UK: Facebook: http://po.st/CRUKFByt Twitter: http://po.st/CRUKTWyt Instagram: http://po.st/CRUKIGyt Google+: http://po.st/CRUKGPyt