Soon after birth, even if the little baby does not cry, the eyes are always full of tears, and in the morning there are eye droppings, and no amount of medication has improved. In fact, the baby may suffer from neonatal dacryocystitis, which is a blockage of the outflow channel of the child’s tears, mostly caused by a congenital membrane closed or by epithelial debris blocked in the mother’s birth canal. Before 4 months of age, you can perform tear duct irrigation for therapeutic diagnosis and apply the appropriate eye drops for the baby to reduce inflammation and prevent acute infection; after 4 months of age, you can perform tear duct exploration according to the baby’s condition, which is very effective.