Neonatal dacryocystitis is mainly due to a combination of infection and inflammation due to poor tear outflow channels caused by the unatrophied rupture of the HARB’s membrane at the end of the nasolacrimal duct during fetal life. Symptoms usually appear shortly after birth and become apparent around half a month. It can develop in one or both eyes and manifests as ocular tearing or as tearing and excessive eye discharge in the affected eye. Squeezing the lacrimal sac area often results in purulent secretions returning and overflowing. Treatment: For children less than 1 month old, massage of the lacrimal duct area can be performed as prescribed by the doctor for self-healing. children over 1 month old should go to the hospital for lacrimal duct irrigation, and for children 4 months old who still cannot be cured, lacrimal duct exploration surgery is required. If lacrimal duct probing does not cure, lacrimal duct placement can be performed. Our ophthalmology department handles thousands of patients with various types of congenital lacrimal duct occlusion every year, with a cure rate of 99.9%.