The lacrimal duct is the tear duct, and some newborn infants will have temporary blockage of the lacrimal duct. As each organ grows and develops, the tear duct can be unblocked on its own, and most infants are able to unblock their tear ducts around 6 months of age, but there is a certain amount of fluctuation around this age due to individual developmental variability. parents may consider massage to help unblock the tear ducts in infants before 6 months of age. For infants over 6 months of age, massage may not be effective and a lacrimal duct pressure flush or lacrimal duct exploration under general anesthesia may be required. This is one of the simpler, safer, and more successful procedures, and post-operative care should be taken to prevent infection. There is also the possibility that an infant may have an eye disease such as conjunctivitis that is causing the blockage of the lacrimal duct, which requires targeted treatment under medical supervision. If it is caused by bacterial or viral infection, antibiotic eye drops can be used (e.g. erythromycin eye drops, chloramphenicol eye drops, etc.); if it is caused by local allergy, anti-allergy medication can be chosen (e.g. Benadryl, chlorpheniramine, etc.). After excluding disease factors, if the infant still fails to unblock the tear duct around 6 months of age, it is a congenital blockage of the nasolacrimal duct. If no measures are taken, it will easily lead to frequent tearing and the accumulation of purulent secretions in the corner of the eye, and untimely cleaning will also easily lead to bacterial infection, which in turn will lead to redness, redness, swelling and ulceration of the skin in the corner of the eye or around the eye. The lacrimal intubation surgery has the characteristics of high safety and good effect, and is currently the preferred treatment for congenital nasolacrimal duct blockage.