Headaches Very Often

My girlfriend is having serious headaches very often, as often as once a week and sometimes more. They last for more than a day. Varies in degree but has causes nausea/vomiting and temporary blindness. She has been to a lot of specialists and been for scans, all come up clean. We have considered dehydration, but replacing water and electrolytes doesn't solve it, low blood sugar, but boosting it...click here to continue

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