I feel for all of you who have been diagnosed with autoimmune chronic uticaria. I was diagnosed in Aug 2008 and after many prescriptions and missing many days of work, I resorted to accupuncture. My lips and face would swell and my entire body was covered in hives. I started accupunture in Feb and in April had no more hives. Now I am hive free and taking no meds. It may not be the answer for everyone but it was for me. I also found a website that had a listing of histimine foods which I omitted from my diet during my illness. You may find this helpful too.
I wish all of you well.