Trigeminal neuralgia may be caused by abnormality of the trigger zone.

@article{Liu2010TrigeminalNM,
  title={Trigeminal neuralgia may be caused by abnormality of the trigger zone.},
  author={Jia-qiang Liu and Juan Dai and E Lingling and Dongsheng Wang and Hongchen Liu},
  journal={Medical hypotheses},
  year={2010},
  volume={74 5},
  pages={818-9}
}
Trigeminal neuralgia is a painful unilateral neuralgia of the trigeminal nerve characterized by agonizing, paroxysmal, and lancinating facial pain with unidentified causes. Usually it is triggered by stimuli at specific area in head or neck which is called trigger zone clinically. The pathophysiology of trigeminal neuralgia is thought to be focal mechanical compression of the trigeminal nerve at a point close to the brain stem, but also not quite clear. Unclear causes lead to unidentified… CONTINUE READING
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