Various diagnostic programs can help find the source of chronic urticaria.

First, the patient should adhere to a special diet for four weeks, and record the exact progression of symptoms.

The next step is a weeklong series of tests in hospital, during which blood, stool and urine are tested; the patient is examined with x-ray and ultrasound; and the patient is tested for sensitivity to foods, histamine, and skin irritants.

The patient’s stress levels are also analyzed: stress can cause urticaria, and of course is often a result of dealing with chronic urticaria.

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