If you followed the avoidance measures from the first testing results, and found relief, then tell about it. If you haven't noticed anything comparative, then don't bother going into detail.
Our bodies completely change every 7 years....
I don't know what type of allergy testing this doctor will be doing for you ... there are so many different types and outcomes. I'd be sure to ask for names and expected results?
I had a derivation of the Lees-Miller technique back in the 80s and it saved my life. It was testing that, once they determined the level of allergy, the shot I took --even that day--- covered me for the allergen. That meant, as soon as I was "covered" in the shot for say, beef, well, I had a whopper for the first time in eons and didn't react! It desensitized immediately while also working for long-term coverage. And it has ... took the shots for a few years, tapering off, and am still good on most all things.
But you might be asked to keep a diary prior to testing, so you don't spend all your money testing for things that may not be a problem.
I don't expect much from "grouped" foods or inhalent allergens. I have NO faith at all in the blood testings either, since that only shows antibodies for things you're allergic to --if you have been exposed to them recently. Anything you've stayed away from because of reactions, won't show on those.
I like the testing done with the acrylic tube you hold and small current passed through it! High tech and excellent results. No worry about reacting to an "under the skin" testing, like I always had because I'm so "brittle" when it comes to allergic reactions. If you can find an allergist who uses that, what a breeze! (Your skin gives off a galvanic reaction that is measurable for allergens.

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Good wishes. Allergies can make you feel "crazy" and cause all sorts of physical maladies such as deafness and heart problems too!
Good wishes on this!
PS I almost had (old time) testing done last year at my ENT's office ... until I spoke to the lady who did the testing and she was using words like "just" and "nobody" so I backed out. I'm sooooo allergic, I was hospitalized from testing a few times!