Chronic Urticaria: Following Practice Guidelines

Erin P. Westby, MD; Charles Lynde, MD, FRCPC; Gordon Sussman, MD, FRCPC, FACP, FAAAI


Skin Therapy Letter. 2018;23(3):1-4. 

In This Article


Urticaria can be arbitrarily divided into an acute condition wherein wheals, angioedema or both last less than 6 weeks versus a chronic process wherein wheals, angioedema or both last greater than 6 weeks. Generally, acute urticaria may be associated with identifiable causes, most notably an acute viral infection or an allergic reaction to medications, insects or foods. Alternatively, chronic urticaria can be further subdivided into two groups based on whether an inducible cause can be identified; induced urticaria and chronic spontaneous urticaria.[6–8]

It should be noted that urticarial-related disease such as Schnitzler's syndrome, Gleich's syndrome, Well's syndrome, bradykinin-mediated angioedema, cutaneous mastocytosis, and urticarial vasculitis are not considered subtypes of urticaria as they reflect distinctly different pathophysiology.