A 29-year-old woman visited the Primary Care clinic to receive treatment for a diffuse erythematous rash on her upper and lower extremities, and trunk. Urticaria, or hives, is a common condition that affects one in five people at some point in their lifetime. Urticaria can be triggered by a number of factors, including foods, medications, insect bites, pollen, pet dander, emotional stress, infections, and exposure to heat or cold. Urticaria is characterized by areas of localized edema (wheals) surrounded by erythema, and a blanchable, erythematous, pruritic rash. The rash migrates from one area of the body to another. Treatment of urticaria involves identifying and avoiding or treating the trigger, and providing symptomatic relief with oral antihistamines. Oral steroids may be used for patients who do not improve with use of antihistamines.
KeywordsUrticarial Exanthema Exanthem Hives Wheal Welt Histamine Inflammatory Inflammation Dermatographism Allergies Antihistamine Cetirizine
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