Balloon dilation technique is a kind of cardiac catheter intervention technique, first used for the treatment of vascular stenosis diseases, some scholars introduced this technique into the treatment of lacrimal obstruction diseases in the 1990s, I also carried out this procedure at the end of the last century, but the effect of this method is not ideal, its principle is to first perform lacrimal imaging, determine the site of lacrimal obstruction, probe through the lacrimal tract with a hollow lacrimal probe, and then through the probe Under the guidance of the guidewire, a balloon dilatation device is inserted retrograde through the inferior nasal tract, and under X-ray fluoroscopy to ensure that the balloon device passes through the obstructed area, gas is injected into the balloon to keep the balloon dilated for 5-10 minutes to dilate the obstructed area of the tear duct and achieve the purpose of treating tear duct obstruction, and then the balloon device and guidewire are removed to reach the obstructed area. Neonatal dacryocystitis is caused by the embryonic remnants of the lower end of the nasolacrimal duct without degeneration, this obstruction is a membranous obstruction, the vast majority (more than 95%) can be cured by lacrimal flushing and lacrimal tract exploration, there is no need for this complex treatment method, if the lacrimal balloon dilation is used for these neonatal dacryocystitis with good treatment effect, there is the problem of excessive medical treatment; for refractory neonatal dacryocystitis using this Refractory neonatal dacryocystitis is caused by bony nasolacrimal duct malformation or a long course of neonatal dacryocystitis resulting in severe obstruction of the nasolacrimal duct, and these severe lacrimal duct obstructions are treated by lacrimal balloon dilation, which is difficult to keep the lacrimal duct permanently open to achieve the purpose of cure. It should not be promoted as a method of treating neonatal dacryocystitis.