Trigeminal autonomic cephalalgia (TAC) refers to a group of
primary headaches that occurs with pain on one side of the head in the
trigeminal nerve area and symptoms in
autonomic systems on the same side, such as eye watering and redness or drooping eyelids.[1][2]
Short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms (SUNA)
Long-lasting autonomic symptoms with
hemicrania (LASH)
TACs can be differentiated by the length and frequency of recurrence of the headaches.[3]
Treatment
Treatment for TACs varies depending on the exact type, but can include medication such as
Indomethacin (in the case of chronic paroxysmal hemicrania) or acute and prophylactic therapy (in the case of cluster headache).[4]
^Swanson, Jerry W.; Bartleson, J. D. (2022).
"20. Cranial and facial pain". In Jankovic, Joseph; Mazziotta, John C.; Pomeroy, Scott L. (eds.). Bradley and Daroff's Neurology in Clinical Practice. Vol. I. Principles of diagnosis (8th ed.). Edinburgh: Elsevier. p. 249.
ISBN978-0-323-64261-3.