Headache following exposure of the unprotected head to a very low environmental temperature.
- At least two acute headache episodes fulfilling criteria B and C
- Brought on by and occurring only during application of an external cold stimulus to the head
- Resolving within 30 minutes after removal of the cold stimulus
- Not better accounted for by another ICHD-3 diagnosis.
This headache is due to external cooling of the head, such as occurs during exposure in very cold weather, when diving into cold water or when receiving cryotherapy. Some patients develop intense, short-lasting, stabbing headache midfrontally, although the pain can be unilateral and temporal, frontal or retro-orbital.