TY - CHAP M1 - Book, Section TI - Solar Urticaria A1 - Maurer, Marcus A1 - Fluhr, Joachim W. A1 - Weller, Karsten A2 - Kang, Sewon A2 - Amagai, Masayuki A2 - Bruckner, Anna L. A2 - Enk, Alexander H. A2 - Margolis, David J. A2 - McMichael, Amy J. A2 - Orringer, Jeffrey S. Y1 - 2019 N1 - T2 - Fitzpatrick's Dermatology, 9e AB - AT-A-GLANCEAn uncommon form of chronic inducible urticariaErythema and itchy wheals occur within minutes of sunlight exposure and resolve within hours.May be disabling and, rarely, life threatening.Phototesting confirms the diagnosis, determines the trigger threshold, and identifies the eliciting wave lengths.Sensitivity may be to ultraviolet B, ultraviolet A, visible light, and/or any combination, but most commonly to ultraviolet A and visible light.Sunlight avoidance, high–protection factor broad-spectrum sunscreens, and antihistamines may help.Omalizumab may be a helpful second-line treatmentPhototherapy may also help but is usually not feasible as long-term treatment SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/04/16 UR - dermatology.mhmedical.com/content.aspx?aid=1161327318 ER -