Table 1 Trigeminal neuralgia diagnostic criteria based on ICHD-3

A. Recurrent paroxysms of unilateral facial pain in the distribution(s) of one or more divisions of the trigeminal nerve, with no radiation beyond, and fulfilling criteria B and C.

B. Pain has all of the following characteristics:

 1. Lasting from a fraction of a second to two minutes

 2. Severe intensity

 3. Electric shock-like, shooting, stabbing or sharp in quality

C. Precipitated by innocuous stimuli within the affected trigeminal distribution

D. Not better accounted for by another ICHD-3 diagnosis