Chronic Urticaria

**Definition:** Wheals (urticaria) and/or angioedema presented with daily symptoms lasting for more than 6 weeks. It may be classified into chronic spontaneous and chronic inducible urticaria depending on whether a specific trigger can be linked to the development of vascular reaction.

**Tree numbers:** - C17.800.862.945.533 - C20.543.480.904.533 - C23.550.291.500.360