Tear duct flushing is a common treatment for chronic dacryocystitis and lacrimal duct stenosis. Tear duct flushing is not advocated in the acute phase, as it can lead to aggravation of local reaction. Precautions are as follows: 1, relieve the patient’s nervousness, do a good job of explanation; 2, the body position to take a lying or sitting position, can be appropriate application of surface anesthetics; 3, the tear dots are small, narrow, available tear dots dilator expansion; 4, when flushing, slowly into the needle, to ensure that the needle into the smooth before flushing; 5, avoid the formation of pseudo-channel, pseudo-channel formation will be swollen locally, can gradually disappear through external dressing.