INTRODUCTION AND DEFINITION
Neuralgia is a form of neuropathic pain that is characterized by the following features [1-3]:
●Paroxysmal, brief (seconds to a few minutes), shock-like or lightning-like pain that follows a peripheral or cranial nerve distribution and can spread to adjacent areas in the course of the attack.
●By definition, no objective neurologic deficits are found in the distribution of the affected nerve. (See "Overview of craniofacial pain".)
●Attacks can be provoked by nonpainful stimulation (allodynia) of trigger points or zones.
●A refractory period follows attacks; the duration of the refractory period shortens as the disease progresses.