Most people love to be outside on a sunny day, letting the sun warm their faces.
But not everyone looks forward to the sunshine, because for some people even the smallest amount of sun is literally deadly. The illness is called Porphyria, and it strikes about one person in a million. The problem occurs when a person's body cannot break down the chemical compound known as porphyrin, which causes blood to be red. This provokes toxins to build up in the blood and become poisonous. When their skin is exposed to the sun, some patients experience pain and swelling or the formation of blisters.