A generic description of pain of non-dental origin. It includes conditions such as trigeminal neuralgia and post-herpetic neuralgia. Atypical facial pain (sometimes called persistent idiopathic facial pain) affects middle-aged women more than men and is characterized by continuous pain for months or even years. It is often described as gripping or vice-like. it affects the maxilla more than the mandible, and may cross the midline and other anatomical boundaries. There are no clear precipitating factors although patients are frequently depressed.
Woda A., Tubert-Jeannin S., Bouhassira D., Attal N., Fleiter B., Goulet J. P., Gremeau-Richard C., Navez M. L., Picard P., Pionchon P., Albuisson E. Towards a new taxonomy of idiopathic orofacial pain. Pain 2005;116(3):396–406.