Chronic urticaria is a disorder characterized by itchy erythematous plaques with edema lasting 6 weeks or more. The prevalence is 1%, and two thirds of these cases are “chronic spontaneous… Click to show full abstract
Chronic urticaria is a disorder characterized by itchy erythematous plaques with edema lasting 6 weeks or more. The prevalence is 1%, and two thirds of these cases are “chronic spontaneous urticaria (CSU).” Drugs, food, infections, and systemic diseases may be etiologic factors for CSU, although it may be idiopathic.
               
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