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We don't fully understand what all causes headaches. The most common types come from stress. We tighten our muscles when we are under stress. I get headaches from my sinuses, as do
http://answers.ask.com/Health/Diseases/where_do_he...
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Migraine is a genetic neurological disease of which pain is only one possible symptom - Migraines without the pain portion of the attack are called acephalgic Migraine. Although the
http://wiki.answers.com/Q/What_system_does_the_mig...
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While tension headaches are the most frequently occurring type of headache, their cause is not
http://www.chacha.com/question/how-do-headaches-co...
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Headaches can be caused by a variety of reasons. Some of these reasons include dehydration,
http://www.chacha.com/question/why-do-headaches-co...
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