| http://www.w3.org/ns/prov#value | - According to the newsletter Harvard Women???s Health Watch, a migraine ???occurs when nerve cells in the brain become activated, usually in response to a trigger such as stress or a particular food ??? blood vessels in the brain dilate and become inflamed leading to pounding pain and other debilitating symptoms.???While acknowledging stress, food, light, noise and other triggering factors, researc
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