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What causes Migraine?
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  • The cause is not entirely clear.
  • However, a common theory is that blood vessels in parts of the brain become narrower (go into spasm) which causes the aura.
  • The blood vessels are then thought to open wide (dilate) soon afterwards, which accounts for the headache.
  • There may also be a genetic factor involved as it often occurs in several members of the same family.
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