Table 2

Clinical differences between trigeminal neuralgia and SUNCT/SUNA

FeaturesTrigeminal neuralgiaSUNCT/SUNA
Predominant pain distributionV2/V3>V1V1>V2/V3
Severity of painVery severeVery severe
Duration (seconds)<1–1201–600
Autonomic featuresNone or sparseProminent
Spontaneous attacks onlyNone or rare40%
Refractory periodPresentAbsent
PeriodicityMostly episodicMostly chronic
Preventive treatment of choiceCarbamazepine or oxcarbazepineLamotrigine
  • SUNA, short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms; SUNCT, short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing; V1, first division of the trigeminal nerve; V2, second division of the trigeminal nerve; V3, third division of the trigeminal nerve.