Urticaria is a vexing problem, to the patient who teachers who have stimulated my interest and helped suffers from the annoying pruritus and the fear oflife me to understand the basic and clinical aspects of mast threatening reactions, to the physician who faces the cell-related problems is long. I would like to specifi challenge to find the cause of the eruption and to cally mention J.N. Fink during medical school train control the symptomatology, and to the scientist who ing in Milwaukee, J.R. Pomeranz and R.W. Belcher is asked to explain the process that elicits tissue during dermatology...