It is often sad that this can be psychosomatic. Some people say that a repatriation therapy should help. But others have gotten rid of their allergies through food changes or other things.
What experience do you have in this field or can anyone scientifically explain why the above things cannot work?
For years I suffered with what I thought were mold allergies (they got worse after rain...) I finally went to see an allergist, got tested, then committed to the 3-5 year course of treatment.
I never thought there was anything I could do besides Zyrtec/Sudafed/Kleenex. Turns out I was allergic to dust mites, and there were some concrete changes I could make in my environment (wood floors, cleaning regularly, ...) That made a huge difference while I retrained my immune system.
I'm two years into shots (monthly now, not weekly), my symtoms are significantly better, and my only regret is that I didn't do this 20 years ago.
After changing my diet and doing intermittent fasting for about a year I completely cured myself. I haven't grass allergy in more than 5 years. I can eat any fruit without any signs of discomfort.
Look up the standard medical advice on keeping your house clean and mold free and etc. It does exist and it is well established, respectable, etc, but doctors tend to gloss over it in favor of writing you a prescription. Go do all that stuff in spades first before trying anything "crazier." That alone may give you substantial relief.
This means also look into things like Sick Building Syndrome. Maybe it's the place you are living or working. That actually happens.
From discussions I have had with people who researched (read up on heavily) this stuff, it's possible that having an undiagnosed parasitic infection promotes allergies. I have no idea what step two is with such info. Just tossing it out there.
I used to spend time on a chelation list (it's how you treat metal poisoning). Metal poisoning may be a factor in allergies and is something most medical doctors won't test for or treat (or, if they do treat it, from what I gather, they often mistreat it -- according to a guy with a PhD in chemistry and published author I used to know who was trying to promote proper chelation).
If you explore that, you will likely find yourself in the land of woo and conspiracy theorists and anti-vaxxers and they will hate on you just as much as the general public hates on their ilk if you don't drink the koolaid and parrot the same things. So if you want to look into the possibility of metal poisoning and don't want to join in the mantra that all doctors are evil and the government is a conspiracy and so forth, gird your loins and expect to be given hell from all sides and be in the wrong in the eyes of everyone.
Or maybe you will get lucky and find sources of support that successfully take the middle way on such things. It's been a few years since I hung out in chelation spaces online. Maybe there is better stuff these days.
Suffered from "hay fever" since I was a kid. Summertime was the worst time when I didn't take my [allergy medication flavor-of-the-month].
I went to another region in the US for college, was there about 10 years before moving back and it really improved my allergies in my home state.
That's a drastic suggestion; but one none-the-less.