I developed hives on my legs, chest and arms. Not sure if it was sun exposure, or a reaction to my sunscreen. The hives were unbelievably itchy (like mosquito bites) and the oral prednisone course, nor zyrtec seemed to help much. The hives are better, but skin colored and still present a full week later. Does this seem like a photosensitive rash or contact dermatitis? I do have an appointment with an allergist tomorrow...just wondering if anyone has experienced this? My lupus has been non symptomatic to this point.