http://www.batnet.com/spencer/theory.html [Hypothesis] Caffeine, caffeine withdrawal, adenosine, and primary headache by Barry Spencer Introduction This article introduces the theory that all primary headache, including all migraine, may be caffeine withdrawal. This article was intended for publication in a medical journal, but is written so as to be understandable by non-scientists. Hypertext _link_s connect directly to the abstracts of referenced articles. Please email the author with your questions and comments.

headaches, Actually, this is pretty universally understood to be the result of vasoconstriction, and is why a stiff cup of coffee will sometimes stop an incipient migraine cold.  Other times it makes it worse, go figure.... Katherine

Katherine High blood pressure?

<snip   Other times it makes it worse, go figure.... Katherine High blood pressure? No thanks.... Katherine