Which dermatologic conditions should be included in the differential diagnosis for acute urticaria (hives)?

Updated: Mar 21, 2018
  • Author: Henry K Wong, MD, PhD; Chief Editor: Michael A Kaliner, MD  more...
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Answer

Urticaria may be confused with a variety of other dermatologic diseases that are similar in appearance and are pruritic, including atopic dermatitis (eczema), maculopapular drug eruptions, contact dermatitis, insect bites, erythema multiforme, pityriasis rosea, and others. Usually, however, the experienced clinician is able to distinguish these conditions from urticaria because of the lesions' distinctive appearance, the fact that they are intensely pruritic, and because the lesions blanch completely with pressure (see Clinical Presentation). [1]


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