 The purpose of the research protocol is to perform a pilot study to determine the levels of 25-hydroxy vitamin D 25OHD, the storage form of vitamin D, in subjects with chronic urticaria and angioedema. Vitamin D is recognized as a key element in the regulation of the innate and adaptative immune system, and deficiencies of vitamin D could play an important role with inflammatory skin conditions such as chronic urticaria and angioedema. 