Neonatal dacryocystitis
Neonatal dacryocystitis is caused by the failure of the embryonic residual membrane at the lower end of the nasolacrimal duct to degenerate, which blocks the lower end of the nasolacrimal duct, resulting in the retention of tears and bacteria in the lacrimal sac, causing secondary infection. Neonatal dacryocystitis is a very common congenital eye disease in infants and young children, and is also a common and frequently occurring disease in pediatric ophthalmology. The baby's eyes are often tearful. There are many thick secretions flowing out of the baby's eyes. The onset time can be early or late. Some have symptoms on the first day after birth, while others may appear after a week or a month.