ABSTRACT
Most types of urticaria can be readily diagnosed based on the history and tests (provocation or laboratory) that are relatively simple to administer. However, some patients present with a confusing array of symptoms and the hives mayor may not be present at their initial presentation. A wide variety of possibilities need to be considered until a definitive diagnosis is made, including the possibility that more than one type of urticaria may be present. Before considering specific possibilities one may encounter, some general guidelines may be helpful in an initial consideration of any patient.
