A. Head and/or facial pain with the characteristics of 13.1.1 Classical trigeminal neuralgia with or without concomitant persistent facial pain, but not necessarily unilateral
B. A disorder, other than those described above but known to be capable of causing painful trigeminal neuropathy, has been diagnosed
C. Pain has developed after onset of the disorder, or led to its discovery
D. Not better accounted for by another ICHD-3 diagnosis.