I to have allergies but the doctor has no idea as to why....I have paid very close attention and the weather does not make a difference nor does mowing the lawn, etc, etc.....the only thing I can think of is the change in atmospheric pressure because when I am out on the deck, in the house, in somebody else's house, etc, etc, my eyes start to sting, my throat sounds rough like I am getting a head cold, I get stuffed up, etc, etc.....after awhile I can actually feel the pressure being released and just like turning a light switch on and off, that is exactly how fast it changes....doesn't matter if it is cold, warm, raining, snow, pollen, dust, animals, etc...etc....so that is what I think my problem is....