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Top 10 Causes of Migraine Headaches in Pregnancy If you’re pregnant, you’re no doubt experiencing
new aches and pains. If you’re also one of the millions of pregnant
women who experience migraines, you might be glad to know that pregnancy eases migraine
headache symptoms for many women. But even if it doesn’t for you, the information
in this article can help you cope. Causes of Migraine Headaches
Exactly what causes migraine headaches isn’t known. But migraines appear to involve changes in
nerve pathways, neurochemicals, and blood flow in the brain. Researchers believe that overly excited brain
cells stimulate a release of chemicals. These chemicals irritate blood vessels on
the brain’s surface. That, in turn, causes blood vessels to swell
and stimulate the pain response. Estrogen is thought to play a role in migraines. That’s why pregnancy, menstruation, and menopause
often change a woman’s pattern of migraine headaches. The neurotransmitter serotonin also appears
to have a key role in migraines.

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