Fixed solar urticaria with delayed onset.

Wessendorf, Ulf; Hanneken, Sandra; Haust, Merle; Neumann, Norbert J · J Am Acad Dermatol · 2009

case_report · Level V

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Abstract

Fixed solar urticaria (FSU) is an extremely rare type of solar urticaria characterized by urticarial wheals appearing frequently confined to fixed areas of the skin. After a few minutes of exposure to sunlight or other sources of radiation, urticarial lesions can usually be induced exclusively in the same localization. We report a case of delayed onset FSU occurring 6 hours after exposure to ultraviolet A and B light.

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