I would like to start off by saying that I have been to the allergist multiple times. My blood work showed histamine and that I am having allergic reactions. I have been tested for 50-60 food items. All the tests came back negative. I have lost a lot of weight and I'm at the time of my life where I could be going through some hormonal changes. Also, the weight loss causes hormonal fluctuations. My allergic reactions started about 1 1/2 years ago. It started off with facial swelling, sores in the mouth and tongue, sores outside the lip area, lip swelling, body swelling, and constipation. I do not have anaphylactic shock. I have tested foods on my own and eliminated some things in this process. Since things have improved, the allergist suggested that I give it some time to see if it passes. His thoughts are that it might have something to do with weight loss/hormones. He suggested if I have a reaction that I take an antihistamine. Allegra seems to work well for me.
Anyways, I have eliminated peanuts, legumes, tree nuts, soy. I was still having some flare ups. Then I realized that most commercial salad dressings contain soybean oil. Also, most restaurants baste their food with a butter flavored soybean oil product. The last couple of weeks I have eliminated as much soybean oil as I can. I request all of my foods to be grilled, broiled, steamed dry. I have eliminated all bread while out because I don't know if they are made with soy flour. Also, I make my own dressings and sauces. I seem to be clearing up. I have been reading all of the ingredient lists on the foods I buy to make sure they do not contain any soy. Of course, only time will tell.
I did some research on soybean oil. It seems that soybean oil is not considered an allergen because it is highly refined. I guess I could be unique and still be allergic to it.

I don't know. Any thoughts?
Anyone else dealing with something like this? TIA