Most newborns with dacryocystitis are born with a period of time when the lower end of the nasolacrimal duct is not fully developed and is closed by a layer of congenital remnants, or is blocked by epithelial cell remnants causing lacrimal obstruction, which prevents tears from flowing into the nasal cavity and causes overflow of tears, and a few are caused by bony lumen narrowing of the nasolacrimal duct or nasal malformation. The inability to drain tears and secretions from the lacrimal sac allows bacteria to accumulate and multiply in the lacrimal duct, resulting in dacryocystitis. Its incidence is about 5% to 6% of newborns, and it is one of the common eye diseases in newborns. If you find that your child is overflowing with tears or that the skin below the inner corner of the eye is bulging and mucus or pus is spilling when you press on the area with your finger, see your doctor as soon as possible. If your child is diagnosed with neonatal dacryocystitis, don’t be anxious. Most newborns’ tear ducts are still in the developmental stage, so a conservative treatment approach should be taken first. This is usually done locally with antibiotic eye drops in the affected eye, along with lacrimal massage to promote the flow of tears in the direction of the nasolacrimal duct, 2 to 3 times a day, along with lacrimal duct flushing therapy. If the above methods of treatment do not work, then lacrimal duct exploration can be used, using a probe to puncture the membrane, so that the lacrimal duct is unobstructed. There are very few children who have blocked tear ducts due to bony stenosis or nose deformities, in which case surgery or other methods to open the tear ducts should be considered. Neonatal lacrimal sacculitis is a relatively common eye disease that manifests itself in the baby’s eyes, which are often teary. There is a lot of thick discharge from the baby’s eyes, and the onset of the disease can be early or late, from the first day after birth to about a week or a month later.