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by MAD COW on October 19th, 2008
An editorial was published in the British Medical Journal[1] on ice cream headache; it referenced several articles on the effect of rapid consumption of cold foods or beverages. It has been studied as an example of referred pain, an unpleasant sensation localised to an area separate from the site of the painful stimulation.
The effect occurs when something very cold, such as ice cream, touches the top palate in the mouth. The blood vessels constrict due to the cold. This makes the nerves send a signal to the brain to open blood vessels. But this rapid opening of the blood vessels makes fluid back up in the tissues that won't drain for thirty seconds to a minute. This causes a slight swelling in the forehead that causes pain.
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