Fixed solar urticaria induced by UVA and visible light: a report of a case.

Fixed solar urticaria (FSU) is a rare and less severe subgroup of solar urticaria. It is characterized by urticarial eruptions, which occurs on the same parts of the body following sun exposure. The lesions are reproducible at the same sites with similar morphology and distribution pattern after repeated sun exposure. The action spectrum of FSU is broad (300-700 nm). We reported a case of FSU induced by UVA and visible light. The patient responded well to cetirizine treatment.