If you’ve found it frustrating that no one can tell you why you have chronic urticaria hives (including chronic spontaneous urticaria, dermatographia, and even angioedema), I feel you.Especially when IgE allergies are ruled out (testing is negative) or even avoiding what you’re allergic to isn’t helpful. At that point, most doctors will say that there is no answer or clear trigger to what causes urticaria, basically leaving you with an increasing number of medications that may or may not help...