It is common for young parents to come to the hospital with their 2-3 month old babies in their arms, complaining that their children’s eyes have been teary since birth. Old people say that it is because of “fire” and does not need any treatment. However, the baby’s eyes were not only still teary, but also had a lot of eye droppings that could not be wiped away. In fact, this is the baby’s eyes tear duct problems. The most common disease of the tear duct system in infants and young children is obstruction, as well as by the obstruction of the tear drainage is not smooth or drainage obstacles and secondary infections. Tear duct obstruction in infants and young children often occurs in the lower end of the nasolacrimal duct in the Hasner valve area of the membranous obstruction, or lumen for the epithelial cell debris obstruction; a small number of patients due to developmental malformations of the nose, bony nasolacrimal duct stenosis caused. There are statistics that this kind of membranous obstruction of the nasolacrimal duct accounts for about 40% of all cases of obstruction. Lacrimal duct obstruction can produce tearing or tear spillage, 1—3 weeks after birth before the normal secretion of the lacrimal gland, caused by congenital obstruction of the lacrimal system of tearing will not be obvious, after this excessive tearing is of great significance. Due to the obstruction of the tear duct in infants and young children, tear drainage is impaired, and tears and secretions accumulate in the lacrimal sac, allowing microorganisms to reproduce in the blind tract and cause dacryocystitis, which is often referred to as neonatal dacryocystitis in clinical practice. The course of the disease is slow and the symptoms are mild. Many lacrimal duct obstructions can dry up on their own in the first 4–6 weeks of life, while some lacrimal duct obstructions can never open up on their own. Therefore, for children with lacrimal duct obstruction, conservative treatment can be started by giving antibiotic eye drops; instructing parents to place their fingers on the skin of the lacrimal sac area and massage the lacrimal sac downward several times a day; some children can be cured by using massage to rupture the membrane at the lower end of the nasolacrimal duct. In addition, saline irrigation of the tear ducts is used to rupture the residual membranes by utilizing the pressure of the injected water. If there is no improvement after several weeks of treatment with the above methods, tear duct probing is feasible. If there is lacrimal sac inflammation, antibiotics should be given until the acute inflammation subsides before probing. If a few simple probes do not produce satisfactory results and the tear duct is easily damaged due to repeated probes, silicone tube implantation can be performed. If silicone tube implantation fails, nasal anastomosis of the lacrimal sac is feasible.