I get one most evenings - especially in the hay fever season
Hay fever is a bit strange - and not exactly what most people seem to think
e.g. it also occurs outside the pollen season - because mould spores can also trigger it
I also find that I can ride around under trees and past field of rape seed or other trigger plants - with no problem
basically blasting pollen into my nose, face and eyes at 10-20 mph - or more going downhill
all with no real problem
Then I get home, go indoors and 10-30 minutes later my eyes are stinging like mad
and a few hours later I get a sneezing fit that can probably be heard in Japan (according to my wife!)
Her theory is that riding around in high pollen season total over whelms by systems and they shut down
Then- when I get home - things settle down and my systems start reacting normally
Later on in the day my systems react again - for reasons unknown
so - what was the point??
Oh yes
at this time of year - probably hay fever - it can crop up at any age
try taking some non-drowsy hay fever tablets - I use certirizine but different bodies work differently - so try different ones
or just put up with it