Tears in the eyes while sleeping may be related to excessive eye use, eye inflammation, tear duct stenosis and so on. 1. Excessive eye use: prolonged use of the eyes during the day, such as looking at a cell phone or computer screen in close proximity will reduce the number of blinks, and the eyes will be dry and painful, which will promote the secretion of tears, and the patient may have tears in the eyes during sleep. 2. Eye inflammation: If the patient has eye inflammation, such as keratitis, blepharoconjunctivitis, etc., under the stimulation of inflammation, it can lead to tearing when the patient sleeps, and can be accompanied by ocular photophobia and other uncomfortable symptoms. 3. Lacrimal stenosis: When the lacrimal duct is blocked or narrowed, the poor circulation of tears can lead to tearing during sleep. It is recommended that patients with tearing eyes during sleep and other discomforts should consult a doctor in time to evaluate their condition and standardize the treatment under the guidance of the doctor.