Is Caffeine Good or Bad <br />for Headaches? Caffeine has long been promoted as the go-to remedy for a headache. But does it actually work? According to science, maybe. It all depends on the source <br />of caffeine. Caffeine can help headaches caused by vasodilation, swollen blood vessels <br />in the brain. But it'll likely make a headache caused by dehydration <br />much worse. Caffeine from energy drinks can also worsen headaches. They may contain neurostimulants that are associated with dizziness, seizures <br />and strokes. So next time you have a headache, choose wisely.
