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"Headaches in pregnancy tend to be either tension-type headaches or migraines," according to the Baby Centre UK. "Tension headaches won't affect your baby. Your baby won't be harmed while you're having a migraine either. However, getting migraines during pregnancy is linked with an increased risk of high blood pressure and pre-eclampsia."
Tension headaches usually affect both sides of the head and are mild to moderate in severity. They feel like your head is being tightened more than like it's throbbing. Migraines, however, can be a pulsating, severe pain in one area of the head.
There are a number of causes for pregnancy headaches. Your headaches or migraines could be related to any of the following:
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