i've been noticing lately that the debilitating headaches seem to correspond to big weather changes. last time, it was a big drop in temperature. yesterday, i spent about 24 hours with a headache; when the rain finally got here around 7 or 8 p.m., i was suddenly fine.
just discovered that the weather channel online has an aches and pains forecast, theoretically good for predicting arthritis and migraines. think i'll start watching and see if the correlation is real.