There are two possibilities for increased tear flow: 1, reactive increased tear secretion, this part is mainly due to inflammation of the eye surface or various irritation symptoms cause reflex increased tear secretion, like common eye surface diseases such as impingement, conjunctivitis, keratitis, lacrimal glanditis, etc. 2, tear duct blockage, like common from the tear dots to the nasolacrimal duct, the common tear duct, which part of the blockage or narrowing will make tears The main treatment is to carry out lacrimal duct unblocking surgery, such as tear dots narrowing can be performed tear dots dilatation. If the common tear duct or nasolacrimal duct is blocked, tear duct flushing, tear duct stent or tear duct laser can be performed, and possibly tear sac nasal anastomosis can be performed to open up the blocked part of the tear duct to solve the problem of lacrimation.