Caffeine relieves headaches by constricting blood vessels in the brain and blocking adenosine receptors, reducing pain and pressure associated with tension headaches and migraines. It's often included in headache medications due to its vasoconstrictive properties.
Caffeine, a central nervous system stimulant, can alleviate headache pain, particularly tension headaches and migraines, by constricting blood vessels in the brain. This vasoconstriction reduces blood flow and pressure, mitigating the dilation of blood vessels often associated with headache symptoms. Caffeine also blocks adenosine receptors, further contributing to pain reduction.
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