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According to one theory, ice cream headaches are caused by an increase in blood volume of the anterior cerebral artery:

Another theory into the cause of ice-cream headaches is explained by increased blood flow to the brain through the anterior cerebral artery, which supplies oxygenated blood to most medial portions of the frontal lobes and superior medial parietal lobes. This increase in blood volume and resulting increase in size in this artery is thought to bring on the pain associated with an ice-cream headache.

(from Wikipedia)

Does repeatedly experiencing this phenomenon put someone at higher risk for some sort of cerebral vascular accident, or is it not any more harmful than a small increase in blood pressure that one might experience under exertion, despite the painful nature of the headache?

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