I found out through allergy testing. (The skin testing). The blood testing (twice over) was negative for any allergies. They tried to get me off of the antihistamines (both Zantac and Zyrtec) for 7 days to skin test me here in Tulsa- but I ended up in the hospital due to the reactions I was having. I was finally sent to a research hospital in Colorado. It was very unusual that I didn't have bad reactions when they took me off of the antihistamines. As a matter of fact- I was off of them 10 days and did not have any flushing, any episodes of the dumping diarrhea or any throat constriction. When they did the skin testing, I had a huge reaction to both types of dust mites. The research physician then made the comment to me "That explains why you are doing ok here off of the antihistamines" I questioningly said "It does?" She replied "Yes, our humidity here in Colorado is so low that it doesn't support the overgrowth of dust mite"- Well ours here in Oklahoma does. We had to do huge home modifications. Still there is no way to get completely away from them. I am doing better most of the time with the allergies- but it leaves me quite confined to our home. I can only tolerate being outside of our home environment for a few hours at a time- and not everyday. The severe dizziness spells are still there, but that is due to my developing the inner ear condition of Meniere's. I wouldn't worry greatly about mastocytosis-since the elevation in tryptase levels is the biggest indicator of that disease process. It does sound as if you are having allergic reactions to something though. I would encourage you to have skin allergy testing from a good allergist. It was also discovered that I have a pretty big allergy to chocolate (go figure-my favorite), oats, mustard, oranges and walnuts. This was only after a second round of allergy testing after the GI doctor discovered that I had developed gastritis (an inflammation of the stomach lining). It has been like a dominoe effect. I have to be real careful with anything I do.
It is a whole new lifestyle that I am not completely used to yet.
Please keep me updated on how you are doing and what you find out. I spent 8 months wondering if I was going to even see another Christmas with my husband and son. My systemic reactions left me weak and my blood pressure had even dropped as low as 56/34(which is lower than some of the hospice patients that I had seen that were close to death). I was horribly frightened. The scariest thing- is not knowing what is wrong.
Please take care