Table 5. Differential features between SUNCT/SUNA headaches and TN.

SUNCT/SUNA headaches and TN may be different aspects of the same type of disorder [64], and such a nosology would merge cephalgia with neuralgia [92]

SUNCT: short-lasting unilateral neuralgiform headache with conjunctival injection and tearing; SUNA: short-lasting unilateral neuralgiform; TN: trigeminal neuralgia

Feature	SUNCT/SUNA	TN
Autonomic features	Yes, pronounced	Mild, if they occur at all
Location	More likely V1; unilateral	More likely V2 and/or V3; unilateral
Moving neck	May cause an attack	Will not cause an attack
Onset of pain	Abrupt	Abrupt
Pain paroxysms	May occur, but pain is more persistent	Brief (seconds to minutes) with refractory periods or less intense ambient pain between attacks
Time of attack	Daylight more frequent than night	Not specific
Trigger	No	Yes, tends to be a mild stimulus to the trigeminal nerve dermatome