鼻泪管的位置与鼻外侧壁关系密切。后天性鼻泪管阻塞最常见的原因主要是由于特发性狭窄引起的阻塞 ,而继发性鼻泪管阻塞是由于特殊性感染、炎症、肿瘤或外伤引起。双侧鼻泪管较单侧阻塞更少见。据报道 ,继发性双侧鼻泪管阻塞病因包括面部外伤、放线菌感染、结节病、瘢痕性类天 The location of the nasolacrimal duct is closely related to the lateral wall of the nasal cavity. Acquired nasolacrimal duct obstruction is the most common cause of obstruction due to idiopathic stenosis, and secondary nasolacrimal duct obstruction is due to specific infections, inflammation, cancer or trauma. More bilateral nasolacrimal duct obstruction than the more common. It is reported that the causes of secondary bilateral nasolacrimal duct obstruction, including facial trauma, actinomycosis, sarcoidosis, Cicatris