The medical term for brain freeze is sphenopalatine ganglioneuralgia. You may also hear this sensation referred to as cold-induced headache. Brain freeze is caused by the sphenopalatine ganglion nerves, which is a group of nerves near the trigeminal nerve in the brain. These nerves are located behind the nose and the nerves that also cause headache pain. They’re designed to be highly sensitive to pain, presumably to protect the brain.
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