Tears in the eyes but not flowing, in the clinic is most commonly caused by inflammation of the eye surface, narrow or blocked tear ducts, visual fatigue, inverted eyelashes and so on. 1. Inflammation of the eye surface. Localized conjunctivitis, keratitis and other inflammation of the ocular surface may lead to tearing of the eyes, with less irritating tears, which often do not flow out. 2. Narrowed or blocked tear ducts. Because the tears cannot be discharged according to the normal channels, the tears secreted by the eyes accumulate in the conjunctival sac and usually do not flow out. 3. Visual fatigue. After prolonged close-up overuse of the eyes, there is a possibility of eye fatigue, resulting in irritating tearing of the eyes, with fewer tears, which often do not flow out. 4. Inverted eyelashes. Because the eyelashes rub the cornea for a long time leading to irritating tearing, due to the irritation of less tears, often do not flow out. The specific situation requires the patient to seek medical examination to clarify.