If a baby has a blocked tear duct, there will be tearing, and the tearing is persistent, that is, it is tearful throughout the day, and some of it is accompanied by mucus secretions, that is, in the morning, he will get up with eye boogers all over his eyes. It is usually considered that the baby’s lower nasal tract is blocked, if you want to make a clear diagnosis, to carry out the irrigation of the tear duct, when carrying out tear duct irrigation, you can see a large number of mucus-purulent material overflow from the lower tear point. Lacrimal duct blockage in babies is caused by congenital underdevelopment, and most of them may clear up automatically after 3 months, during which time the tear duct is massaged and antibiotic eye drops are ordered to prevent infection. If the blockage is still not resolved after 3 months, we should consider a tear duct exploratory surgery.