
Brain freeze, or sphenopalatine ganglioneuralgia, happens when cold food or drink hits the roof of your mouth, causing blood vessels to rapidly constrict and then dilate[2][4]. Your brain interprets this sudden expansion as intense pain, essentially acting as a survival reflex to protect your body’s temperature[6].
For a quick fix, press your tongue firmly against the roof of your mouth to warm the area back up[3][6]. You can also sip room-temperature water or cover your mouth and nose to trap warm air[3][6].
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