Common causes of watering eye are stenosis of the nasolacrimal duct, abnormal position of the eyelid and irritation of the eye's surface caused by dry eye.
Other possible causes include eyelid inflammation, conjunctivitis and keratitis.
As an initial therapy it is usually sufficient to calm down the eye's surface with artificial tears and to treat infections in the eye area.
Malpositions of the eyelid are corrected, as required, by a surgical intervention.
A general practitioner may perform an irrigation of the lacrimal drainage system in an adult patient.