Criteria:
(1) >= 20 attacks (below)
(2) unilateral supraorbital, orbital or temporal stabbing pain that lasts up to 10 minutes (trigeminal distribution)
(3) one or more of the following cranial nerve autonomic symptoms:
(3a) conjunctival injection or tearing/lacrimation but not both (presence of both indicates SUNCT)
(3b) nasal congestion and/or rhinorrhea
(3c) eyelid edema
(3d) ipsilateral sense of aural fullness or peri-aural swelling
(3d) facial flushing
(3e) ipsilateral ptosis and/or miosis
(3f) ipsilateral forehead and facial sweating
(4) during periods of activity there may be >= 1 attacks per day for more than half the time
(5) exclusion of other diagnosis
Differential diagnosis:
(1) short-lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) – see 17.11.12 and 17.14.06
(2) cluster headache
