Reader: I got a bad sun burn and now it's painful. How can I tell if it's just a regular sunburn or if it's sun poisoning?
Sunburns are never good news. Not only do they leave you red-faced and stinging, but they often leave lasting damage. Sun poisoning may seem much more serious, but it's essentially the same thing. In medical terms, sun poisoning and sunburn are both referred to as photodermatitis, your skin's allergic reaction to overexposure to the sun.
In the case of sun poisoning,...

