The intimate relation existing between headache, migraine and neuralgia at times renders the differentiation of one from another of considerable difficulty, but as it is desired to consider only the latter in relation to nasal disease one must clearly appreciate what is meant by this term.
A comprehensive definition is: "Neuralgia is pain in a nerve or nerves, or radiating along the course of a nerve, of a severe, darting or throbbing character, intermittent, with sensitiveness of the skin and tender points where the cutaneous branches are given off from the deeper parts."
As with headache, the nose is a frequent and yet unrecognized cause of many cases of trifacial neuralgia, and, while it is not desired to imply that nasal and accessory sinus diseases are the most frequent factors in its production, yet they play an important rôle. Hence in all such cases of neuralgia these parts should be