True nasal hydrorrhea is an exceedingly rare condition, not being mentioned in many of our works on nasal diseases. It is true there are many conditions which simulate this, but the well authenticated cases are rare. Let us first review the subject as to cause.
No special lesion can be named, the peculiar discharge being present under so many different conditions. It may follow trauma, with escape of cerebrospinal fluid, but probably an injury of that degree would prove fatal. It may be associated with nasal growths, as polypi, but in the one case thus far reported Bosworth thinks the polypi were the result and not the cause. Nerve lesions, as involvement of the fifth pair; this would act in two ways, both nerve influence and blood supply would be altered and the condition would properly constitute a reflex neurosis. Carious teeth and cerebral lesions may be exciting causes in