Multiple. There are many because the causes of urticaria are many. Some of the tests are actually physical stimuli (temperature, vibration, etc). Most others will involve skin prick or blood testing: cbc, cmp, ana, esr, crp, tsh, food ige, total ige, just to name a few... This is generally very low yield though. A good allergist will help you sort through all the options.
What r the symptoms, tests, & treatments for autoimmune urticaria? Is it different from chronic urticaria?
Not necessarily. Chronic urticaria ilasts longer than 6 weeks, and most of those are of unknown cause, chronic idiopathic urticaria (ciu). Part of ciu is due to autoimmunity. However, the tests for autoimmune urticaria may not be sspecific. Autoimmune urticaria may not respond to antihistamines alone. Such patients may require leukotriene antagonists, prednisone, dapsone, Cyclosporine and even ivig. Read more...