The fetal nasolacrimal duct ends with a membrane called HARB’s membrane. At birth, HARB’s membrane can rupture spontaneously due to the pressure of the birth canal and other effects. Some newborns are born without a rupture of the HARB’s membrane, resulting in poor tear flow pathways. Inflammation of the lacrimal sac, called neonatal dacryocystitis, can occur as a result of co-infection. It usually becomes apparent about half a month after birth. It may manifest as watery eyes and excessive eye discharge. There is often purulent discharge from the lacrimal sac area when squeezed. Treatment: For children under two months old, massage of the lacrimal sac area can be performed as prescribed by the doctor to alleviate the symptoms and strive for self-healing. children over two months old should go to the hospital for lacrimal flushing, and those who are still not cured at the age of four months need to undergo lacrimal duct exploration surgery. Our ophthalmology department handles tens of thousands of patients with various types of congenital lacrimal duct occlusion each year, with a cure rate of 99.9%. In the rare cases where lacrimal duct exploration is not curative, lacrimal duct implantation can be performed.