I don't know for sure, actually. Could be specific dust or pollen or something else. I'm just like dust as some are with spiders or snakes - they think all spiders or snakes are evil and must be eradicated on sight.
I'm that way with dust. Possibly irrational, and maybe it's not even dust. It's just out of the blue and I can't tie it to anything - BAM, it hits me. Maybe a couple times a year. I do know that when I mowed around the white pines in the wind break this spring that the pollen nailed me. I saw smoke coming out of the trees and sat there on the mower trying to figure out HOW the trees could be on fire. It was pollen the breeze was blowing out of them and I was just sitting there in it.
I've got honey - local honey. I'll give it a try.