What is a solar urticaria allergy?

Allergy to sun: Its a type of urticaria (hives) triggered by sun's uv rays. It is a rare condition and can cause severe discomfort to individuals with this condition when they go out in the sun. The exposed skin breaks out in red raised bumps with severe itching lasting for several hours. Sunblocks, antihistamines and limiting the time of exposure to sun can alleviate this condition.

Very rare: Solar urticaria is a rare type of physical urticaria or hives. The hives in this case are induced when the skin is exposed to certain wavelengths of light. It primarily affects exposed skin but hives can be seen other places. The exact mechanism is unknown. Usually if a skin reaction occurs after exposure to sunlight, a photo-allergic or photo-toxic reaction involving a medication is sought.