Dehydration and Migraines: The Trigger Most People Underestimate
This post contains affiliate links. As an Amazon Associate, I earn from qualifying purchases at no extra cost to you. The Trigger That's Easy to Miss If you've ever gotten a migraine on a hot day, after a hard workout, or during a stretch where you just weren't drinking much water, you've probably wondered whether dehydration had something to do with it. For a lot of people with migraines, it does. It's one of the most commonly reported triggers — and one of the easiest to overlook, because the connection isn't always obvious in the moment. Why Dehydration Can Trigger a Migraine Your brain is made up mostly of water. When you're even mildly dehydrated, brain tissue can temporarily shrink just slightly, which pulls on the meninges — the pain-sensitive membranes surrounding the brain. That physical shift is enough to activate pain pathways in people who are already migraine-prone. Dehydration also throws off your electrolyte balance. Sodium, potassiu...