Are hives chronic?

Yes: Urticaria (hives) are "chronic" if they last longer than 6 weeks. Please refer to a case and discussion i wrote on the topic: http://www.Uwhealth.Org/pediatric-pathways/make-these-itchy-bumps-go-away/36971.

Depends: Hives can be acute and last less than 1 day- 1 week or they can be chronic lasting greater than 6 weeks. Acute hives often have a trigger- such as food, medication, bug bite, venom sting, or pet allergy. However, they can also coincide with infections and the cause may not be easy to identify. Hives that are chronic >6 weeks require evaluation by an allergist and often have no known cause.