The nose and eyes are connected, and there is a tear duct system between the nose and eyes. The tear duct includes the lacrimal punctum, lacrimal duct, common lacrimal duct, lacrimal sac, nasolacrimal duct, etc. Tears secreted by the eyes can be excreted through the tear duct into the nose. Abnormalities of the lacrimal system are as follows: 1, when there is severe nasal congestion leading to nasolacrimal duct blockage, patients may have more than tears. 2, if there is inflammation in the lacrimal duct in the middle of the eye and the nose, there may be secretion from the corner of the eye; 3, if the eyes of the little baby have been running after birth, and it is very obvious when they do not cry, then it may be congenital obstruction of nasolacrimal ducts and they need to go to the ophthalmology department of hospitals for lacrimal flushing.