I have an unusual allergy - or maybe it's more common than I think!

I'm generally fine during hot, dry weather, i can cut the grass and walk through fields without even a hint of a sniff.

However, as soon as low air pressure comes, and it goes cloudy and cool during summer (fine during winter) i go into what is like a very heavy hayfever - itchy and constantly running nose. at the moment I am living off Piriteze (UK branded drug - 10mg cetirizine dihydrochloride) and Sudafed (decongestant). During this time, I often have difficulty breathing in bed, but find an asthma inhaler works well with that.
As soon as a high pressure weather system moves back over I'm fine again!!

Is this really that weird? - or am I not alone? - If anyone has any ideas then I'd love to hear!

Thanks for taking the time to read,

Alex.

Not crazy at all. My allergy doctor told me low pressure can cause pressure on sinus passages causing them to narrow, with resulting headaches, increased allergy and breathing problems. There is surgery to correct this and open the sinus passages but it is not always permanently effective. A friend had it done and his sinuses narrowed again several months later. It was very painful surgery so he was sorry he even had it done. Everytime the clouds sweep in and the pressure drops my sinus get wacky, but having seen what he went through, I'm just learning to live with it.