Urticaria and Angioedema in Skin of Color
Urticaria and angioedema are common multifactorial skin reactions. They occur worldwide with all age groups and classes of the population affected. The lifetime prevalence rate for all types of urticaria in Europe was found 8.8%; for chronic urticaria it has been estimated 1.8%, with a predominance of females [1, 2]. Exact data in skin of color are lacking. In Americans with Asian ancestry or Pacific Islanders, urticaria is among the five top dermatological diagnoses . In elderly African-Americans, self-reported urticaria was noted in 4.9% . A nationwide study from China analyzing chronic urticaria (n = 2710) showed that the most frequent was the idiopathic subtype (68.1%), followed by physical urticaria (29.3%). Females were more commonly affected than males .
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