[Urticaria and angioedema].

Urticaria is considered a heterogeneous group of diseases that share different patterns of skin reactions. The wide diversity in urticaria subtypes have been identified and this reflects partial understanding of the causes or factors that trigger it, as well as the molecular and cellular mechanisms that are involved in their physiopathology. The objective of this article was to make an extensive review of the literature to be able to offer the readers a complete information and updating on the basic, ethiologic and physiophatologic mechanisms and mainly to make a special emphasis on diagnosis and treatment of urticaria, promoting the continuous medical education.