On 26/10/07 15:53, in article ,
"echinosum" wrote:


Sacha;756302 Wrote:
Has anyone else noticed that as the glass rises they sometimes, just
occasionally, get a bit of a headache.
Do you find occasionally, just occasionally, you get a headache on a
Tuesday? Must be something about Tuesdays...

Any minute you'll be patting me on the head..... ;-)

Normal variation in pressure at sea-level due to weather, eyes of
hurricanes and tornadoes excepted, is roughly from 980 to 1035 mbars, a
maximum difference of 5.5%. That's about the same as the change from
climbing (or descending) 500m in altitude. I'm unwilling to believe the
difference is large enough to promote any medical condition. Having been
at high altitude in the Andes for over two months, I descended from
3700m to sea-level in a day (by bicycle), thus experiencing a sudden
increase in pressure of over 50% in just a few hours, and I didn't have
a headache at the bottom. I would have had a headache if I had done it
in reverse so fast, and that would have been due to oxygen
deprivation.

What seems more likely is that there is another aspect of the weather
that is causing the symptoms. High pressure is generally associated
with dry weather, and in winter the humidity would be especially low in
cold, dry weather. Dehydration is a known cause of headaches.



Could be. But it doesn't seem right to me.

--
Sacha
http://www.hillhousenursery.co.uk
South Devon
(remove weeds from address)
'We do not inherit the earth from our ancestors, we borrow it from our
children.'