Watery eyes are mostly referred to as tearing, which is mainly caused by conditions such as exuberant secretion of the lacrimal gland or blockage of the drainage area, and can be caused by emotional fluctuations, keratoconjunctivitis irritation, or narrow obstruction of the tear ducts. Tears are one of the more common clinical manifestations of ophthalmology, which may be caused by various stimuli leading to exuberant secretion of the lacrimal gland, or may be caused by normal secretion of the lacrimal gland but obstruction of the tear drainage site. Emotional fluctuations such as excessive joy or sadness, as well as corneal conjunctival infections and inflammation or inverted eyelashes, lid entropion, and mechanical scratches on the corneal epithelium can stimulate tear secretion and lead to the discomfort of tearing. In addition to the tear drainage system occurs in the tear duct congenital atresia or membrane closure, tear duct stenosis obstruction and dacryocystitis and other conditions, hindering the patient’s tear drainage, excessive accumulation of tears can be overflowed out of the eyes, the patient may appear symptoms of tearing. It is recommended that patients with frequent tearing of the eyes accompanied by other discomforts should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.