"David WE Roberts" wrote

Thought about most things, I hope.
Given that it is much worse in the car with the air conditioning
(including pollen filter) on and it is much better outside I think the
primary cause is lack of moisture.
Hence my query about a humidifier.
It could turn out to be a variant of hay fever (which would be a result
because allergies are treatable) but I suspect not.


Car air conditioning can cause problems due to a build up of bacteria in the
system, even with our car regularly serviced at a main agent I had occasion
to have to disinfect the system myself. You can buy the stuff at Halfords
etc and a new filter would also be a good idea.
It's very simple, you turn on the engine with the air con working on max and
recycle, close all windows etc, let off the canister (like a smoke bomb) and
close the door and wait a while.

--
Regards
Bob Hobden
W.of London. UK