« on: Yesterday at 00:50:29 »
Why is caffeine good for headaches and migraines, if it decreases cerebral blood flow?
Migraines are very complex (and not very well understood), but one of their features is a vicious cycle of inflammation. Something triggers the cycle, causing inflammation, which brings more blood to the brain, worsening the initial problem, increasing the inflammation... etc. Because caffeine reduces the blood flow (slightly) it can put a damper on the vicious cycle (caffeine by itself doesn't usually cure bad headaches, but when combined with other treatments, the outcome is much better than either alone)
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