What IS brain-freeze?
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A brain freeze is a short, intense pain behind the forehead and temples that occurs after eating something cold too fast.
When the cold stimulus is removed, the blood vessels go back to their normal size and the pain tends to go away, Goldberg said. Despite being called "brain freeze," this brief episode of head pain doesn't cause permanent damage and isn't life-threatening.
Brain freeze is caused by:
Brain freeze is caused by:Cooling of the capillaries of the sinuses by a cold stimulus, which results in vasoconstriction (a narrowing of the blood vessels).
A quick rewarming by a warm stimulus such as the air, which results in vasodilation (a widening of the blood vessels).
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Brain greeze is also known as ice cream headache , cold stimulus headache.
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