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Tension-type headaches feel like a dull or heavy, non-pulsating band of pain, usually on both sides of the head. RXAphotos/Flickr

Health Check: what causes headaches?

Nearly every second person in the world had a headache at least once in the past year. But these can feel very different, depending on which of the nearly 200 types of headache you have.
Scientists have discovered a group of genes that predispose people to migraine. Flickr/mickebear

Group of genes hold the clue in migraine cases

Researchers have identified four new genes linked to the most common form of migraine, in a discovery that could eventually…

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