Title: Urticaria vasculitis induced by diode laser photo-epilation.
Authors: Moreno-Arias GA, Tiffon T, Marti T, Camps-Fresneda A
Journal: Dermatol Surg 2000 Nov;26(11):1082-3
Urticaria vasculitis is an itchy type of hives characterized by blotchy patches of large smooth raised welts. This letter reports on a patient who broke out with it immediately following diode laser treatment. It underscores the importance of a test patch prior to treating the face or large areas.