Centre of Evidence of Dermatology Best practice guidelines

Guidelines chronic spontaneous urticaria Updated on december 2019


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Epidemiological data

Back to decision-making tree Print last updated on 18/09/2020

The prevalence of CSU is not precisely known.

CSU is estimated to affect about 1 in 10 people over the course of their lives, more frequently women (sex ratio of women to men estimated at 2:1), and the majority of patients who visit a specialised centre are under 40 years of age [Asero, 2011].

The incidence of CSU has been little studied, but is estimated to be about 1.9% person-years [Zuberbier, 2010]. It appears to be rarer in children, but epidemiological data are sparse [Lee, 2017].

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