A [[headache]] caused by eating cold foods, such as [[ice cream]] or [[shaved ice]], too quickly.
When adding this tag, make sure it's apparent that this is the case (a frozen treat in their hand, for example).

Expressed in Japanese onomatopoeia as [i]kiin[/i] (キーン).

h4.See also

* "Wikipedia article: Ice cream headache":[https://en.wikipedia.org/wiki/Ice_cream_headache]
アイスクリーム頭痛