I practically live on Benedryl (generic store brand stuff — identical, dirt cheap) because of eczema. Knock on wood it has been 20+ years since I’ve had a bee or wasp sting.
I have eczema that anti-histamines don’t touch. Hydrocortisone is the only thing that works for me.
I’m not sure what it is in foods that causes it, but I break out terribly when I eat vegetables and most fruits.
It’s been something I’ve lives with off and on for years but the last year or so it got a lot more easily triggered.