You probably can't.: The vast majority of chronic hives ends up being defined as chronic idiopathic angioedema, which in english translates as "hives of unknown origin." most likely, most of these patients have chronic autoimmune urticaria, meaning that the hives are caused by the immune system acting against the body. I do not find the labs to evaluate this condition to be particularly helpful.
Answered 12/21/2014
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