Tears are secreted by the lacrimal gland, and under normal circumstances, it forms a layer of tear film distributed on the shallow surface of the eye, while excess tears will flow into the nasopharyngeal cavity through the tear ducts, so they will not normally flow out easily, and only in the case of excessive tearing, incomplete tear ducts, or corneal disease will there be a manifestation of tearing and overflow of tears in children. There are also very few children who have blocked tear ducts due to bony stenosis or nose deformities. Pediatric tearing, tear overflow is how: First, excessive tear secretion, can not flow into the nasopharyngeal cavity in a timely manner, such as when the child is emotional, crying, this kind of tearing is mostly physiological, short-lived; Second, the tear duct stenosis, tear duct obstruction, the cause of which can be caused by inflammation, trauma, but also congenital stenosis of the tear duct, congenital occlusion of the tear duct. Most of the tears caused by the latter two types of etiology are persistent and often accompanied by other manifestations such as recurrent secretions. Third, inflammatory infections of the eye or other eye diseases, common dacryocystitis, conjunctivitis, keratitis, ocular trauma (including excessive rubbing of the eyes, corneal abrasions), and even congenital glaucoma resulting in corneal edema, etc.; If you find your baby often tearing more than, you should go to the hospital in a timely manner to seek medical attention, so that the cause can be found, the symptomatic treatment.