Trigeminal Neuralgia. The most common form of paroxysmal orofacial pain is TN. When a demonstrable structural lesion such as a tumor (e.g., meningioma), vascular malformation or demyelinating disease (multiple sclerosis) has been identified, TN is classified as symptomatic. When the cause of TN is unknown, it is classified as idiopathic. See an orofacial pain specialist or neurologist for diagnosis and management. .
Many causes. Classic trigeminal neuralgia is typically caused by an artery compressing the trigeminal nerve at its "root entry zone". This is where the nerve changes from the central nervous system to the peripheral nervous system. However, trigeminal neuralgia type pain actually can have many other causes, such as tumor, inflammation, vascular lesions, stroke, or may not have any identifiable cause at all!