Neonatal dacryocystitis, also known as congenital dacryocystitis, is caused by the embryonic remnant membrane at the lower opening of the nasolacrimal duct not regressing during development, or by the opening being blocked by epithelial debris, resulting in the nasolacrimal duct not being open, and tears and bacteria being retained in the dacryocyst, causing secondary infection. The clinical manifestations are lacrimation, a little mucopurulent discharge from the conjunctival sac, a slight local elevation of the lacrimal sac, sometimes congestion or eczema of the internal skin, and mucus or mucopurulent discharge from the area of the lacrimal sac under pressure. First of all, conservative treatment is used to press the lacrimal sac between the inner canthus and the root of the nose, so that the mucous discharge is discharged, then local antibiotic eye drops are applied, while the lacrimal sac is massaged in the direction of the nasolacrimal duct, 2 to 3 times a day, and it is possible to flush out the congenital membrane or epithelial debris. When this method is not effective, tear duct flushing is feasible to break through the obstruction, and only when it is not effective again is lacrimal duct exploration considered.