A 27-year-old male is referred to the allergy clinic for symptoms of hives for 2 months. Possible triggers have not been identified.
Figure 1. Urticaria appearing on right arm. Image source: Wikipedia, public domain.
What is the next step?
Figure 2. Mind map diagram of chronic urticaria.
Read more in Chronic Idiopathic Urticaria on AllergyCases.org.