What is Brain Freeze?

A sudden, stabbing pain commonly called “brain freeze” is known medically as a cold-stimulus headache.

The sudden, stabbing pain commonly called “brain freeze” is known medically as a cold-stimulus headache, a brief but intense headache that occurs when something extremely cold—most often ice cream, frozen drinks, or very cold water—comes into rapid contact with the roof of the mouth or the back of the throat.

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Photic Sneeze Reflex

Autosomal Dominant Compelling Helio-Ophthalmic Outburst

The photic sneeze reflex, also known as the backronym ACHOO syndrome (Autosomal Dominant Compelling Helio-Ophthalmic Outburst), is a phenomenon where exposure to bright light, typically sunlight, induces sneezing in specific individuals.

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