1, etiology: neonatal dacryocystitis (also known as nasolacrimal duct blockage), the lower end of the nasolacrimal duct nasal opening is closed by congenital membrane tissue, in the postnatal period of about 4 weeks this membrane tissue is not broken or nasolacrimal duct is blocked by epithelial debris for the main cause of the disease. A few causes are congenital narrowing or blockage of the nasolacrimal duct. 2, clinical manifestations: after 1 month, newborns are found to have lacrimation in one eye, congestion, and a tendency of gradually increasing conjunctival sac discharge, so it is often misdiagnosed as conjunctivitis. At the beginning, the mucus discharge is non-bacterial in small amounts, but soon it becomes infected with a large amount of purulent discharge of bacterial nature. The conjunctiva is mildly congested, the tear sac can be slightly elevated, and the pressure can be seen in the tear dots with mucous or purulent secretions overflowing. 3.Treatment: Initially, the tear sac local pressure massage method is mostly used, 2-3 times a day. Massage pressure direction toward the nasal cavity, forcing the contents of the tear sac down to flush open the closed membrane. After massage eye local drops with levofloxacin eye drops, fusidic acid and other antibiotics to prevent infection. Each eye local drops before the contents of the tear sac squeeze clean before drops, so that the drug fully into the tear sac, this massage method is a more effective conservative therapy. If you use this method for about two weeks so that the effect is not seen, you can consider the implementation of other treatment methods to prevent the conversion to inflammation of the tear sac. Tear duct pressure irrigation can also be used to break through the membrane tissue. When the above methods are ineffective, lacrimal tract exploration should be carried out as soon as possible, which is a method that must be carried out when medication and irrigation methods are ineffective, and is also an effective means of curing the disease. Generally 2-3 times can be cured.