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Why you get brain freeze - and what to do

Brain freeze, technically known as sphenopalatine ganglioneuralgia, happens when something cold hits the roof of your mouth fast - like chugging an icy drink or scarfing down ice cream.

The chill shocks the blood vessels in your palate, making them constrict quick, then dilate just as fast as your body tries to warm things back up. This rapid shift messes with nearby nerves, especially the trigeminal nerve, which handles face sensations.


It freaks out and sends a pain signal to your brain, but since the nerve's wired to your forehead too, you feel it there - like a stab between the eyes.

Scientists think it's a leftover survival trick. Your brain might misread the sudden cold as a threat, like "whoa, something's freezing up here," even though it's just a Slurpee doing you dirty. The fix is simple: press your tongue to the roof of your mouth or sip something warm to calm the vessels down.


This story was posted on 2025-05-10 15:22:56
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