What are the signs and symptoms of acute urticaria (hives)?

Updated: Mar 21, 2018
  • Author: Henry K Wong, MD, PhD; Chief Editor: Michael A Kaliner, MD  more...
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Pruritus (itching) and rash are the primary manifestations of urticaria, and permanent hyperpigmentation or hypopigmentation is rare.

Lesions commonly last 20 minutes to 3 hours, disappear, and then reappear in other skin areas. An entire episode of urticaria often lasts 24-48 hours; individual lesions usually fade within 24 hours or so, but new lesions may be developing continuously. Rarely, acute urticaria can last 3-6 weeks. [29] Scars do not develop.

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