@BenR that's interesting what your allergist said about "gateway allergens". Oral Allergy Syndrome (OAS) symptoms can be worse with high pollen counts, that might've been why you reacted to the tomato sauce like you mentioned. @Sally Raynard welcome to the community! It sounds like a second opinion and allergy testing may be beneficial for you. Both Chronic Idiopathic Urticaria (CIU), also known as Chronic Spontaneous Urticaria (CSU), and OAS can be confusing, especially with limited...

I have been dealing with chronic idiopathic urticaria for 2 years. I don’t typically see hives, just itching all over randomly. I get itchy mouth, tongue and throat as well from time to time. I have thought it was CIU. I have reacted to foods at times - walnuts, eggplant, bananas, avocado… but mostly I really can’t pinpoint my trigger. Maybe it’s both CIU and OAS? I know from allergy testing 20 + years ago that I am allergic to most environmental things- especially dust, mold, pollen and...