Can Dehydration Trigger a Migraine?
Yes, dehydration is a well-established migraine trigger that can cause severe headaches within hours. Studies show that even mild dehydration of 1.5% body weight loss can trigger migraines in susceptible individuals. When you're dehydrated, blood volume decreases and blood vessels in the brain may dilate or constrict abnormally, leading to the characteristic throbbing pain. Additionally, dehydration reduces electrolyte balance and can lower blood pressure, both contributing factors to headache onset. The American Migraine Foundation identifies dehydration as one of the top 10 migraine triggers, affecting approximately 1 in 3 migraine sufferers.
Related Questions
What are the early signs of dehydration headaches?
Can drinking too much water also trigger migraines?
How long does it take for dehydration to cause a migraine?
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