The principle of lacrimal intubation for neonatal dacryocystitis: There are many methods of lacrimal intubation used to treat neonatal dacryocystitis, and its principle is to use artificial tear ducts made of various materials to first probe the blocked tear ducts, then insert artificial tear ducts from the upper and lower lacrimal ducts respectively, then remove them in the lower nasal canal, then fix them and keep them in the tear ducts for 1~3 months before pulling out the artificial tear ducts, hoping that by keeping the artificial tear The hope is to restore the patency of the tear duct through the maintained artificial tear duct. Is this method of lacrimal intubation good? Neonatal dacryocystitis is caused by the non-degeneration of the embryonic remnants of the lower end of the nasolacrimal duct, and this obstruction is membranous, and most of them (more than 95%) can be cured by lacrimal duct irrigation and lacrimal duct exploration, so there is no need for this complicated treatment method. The treatment effect is not ideal for refractory neonatal dacryocystitis, which is caused by severe obstruction of the nasolacrimal duct due to bony nasolacrimal duct malformation or a long course of neonatal dacryocystitis, and it is difficult to keep the lacrimal duct permanently open for the purpose of cure by lacrimal intubation. At the same time, these methods are less effective than those used in adults for refractory neonatal dacryocystitis, and there is a certain amount of damage, so they should also be used with caution. In conclusion, lacrimal intubation should only be used as a treatment for neonatal dacryocystitis and should not be promoted as the preferred method.