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Anyone else plagued with random devastating migraines? The kind of migraines where a phone ringing in the house next door feels like tiny hammers banging away on yer noggin? How do you cope?
DG, I hope you feel better soon.
Caffeine is a vasoconstrictor - it causes the blood vessels in your brain to constrict.
Migraine typically involves vasodilation - the blood vessels in your brain expand, increasing blood flow to that sector putting pressure on surrounding vessels.
Caffeine withdrawal can cause migraines because blood vessels will expand as caffeine leaves your system, and this reaction can go overboard and lead into a migraine.
At the same time, if one is already in a migraine, taking caffeine can help as it will constrict the blood vessels.
Conclusion: Air and water are required to sustain life. Coffee is required to make that life livable.