What are the symptoms of a solar urticaria allergy?

Itchy hives: Upon exposure to sun's rays the exposed skin breaks out in red raised bumps (hives) with severe itching lasting for several hours.

Solar urticaria: Solar urticaria is a type of hives that occurs when the skin is exposed to the sun. The hives are not necessarily on the sun-exposed skin, however. They can come out on skin under clothing. The symptoms are itching and red bumpy rash that looks and feels a bit like a bunch of mosquito bites, but without the puncture of the bite. http://en.wikipedia.org/wiki/solar_urticaria sunscreens can help.