An exanthem is any eruptive skin rash that may be associated with fever or other systemic symptoms. Causes include infectious pathogens, medication reactions and, occasionally, a combination of both.

The American College of Rheumatology (ACR) loosely defines photosensitivity as "a skin rash as a result of unusual reaction to sunlight." Beyond skin rashes that can develop, exposure to the sun can ...

Yet a trip to Puerto Rico with friends did just that. “It was a poor decision to travel there, knowing how the sun affected my skin,” she admits. “I developed a horrible lupus rash all over my ...