Abstract
Chronic idiopathic urticaria (CIU) is one of the mysteries of dermatology. An association between spontaneous CIU and contact allergy sensitization is possible. In this study, we aimed to test the hypothesis that contact allergy might play a role in disease in CIU patients. Furthermore, we examined if patch testing should be routinely performed in patients with chronic urticaria (CU). Ultimately, we concluded that patch testing should be included among the diagnostic procedures for CU.