Cluster-headache jargon

[Wilson Gray]

If you don't know what a cluster headache is, thank God or whomever or
whatever you believe in. Clusters differ from migraines in that, in
the case of the former, there is no aura, no increase in sensitivity
to light and sound, no nausea, and no throbbing. A cluster headache is
just pure, unadulterated pain that has to be felt to be believed. In
any case, here is the tiny vocabulary of cluster headache-specific
jargon:

<http://www.clusterheadaches.com>

Clusterhead: a  person who suffers from cluster headaches

Cluster headache: a kind of pain that beggars description, generally
affecting only one side of the head and face

The Demon: the personification of cluster-headache pain

The Dance: one's physical reaction to cluster pain, whatever that may be

Shadow: a kind of premonitory pain that tells you to get ready,
because The Demon is about to strike

-Wilson Gray

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The American Dialect Society - http://www.americandialect.org