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Related to SUNA headache: SUNCT
An abbreviation for short-lasting unilateral neuralgiform headache with cranial autonomic features, a form of intense headache affecting one side of the face and often associated with tearing, reddening of the conjunctiva, and swelling of the eyelid on the affected side. A SUNA headache is similar to a SUNCT headache; some headache specialists consider SUNCT headache to be a subtype of SUNA and both to be related to disturbances of the trigeminal nerve.
See also: headache