Causes of lacrimal passage blockage

Lacrimal passage system starts from lacrimal punctum, enters lacrimal duct through lacrimal canaliculus, merges into lacrimal sac, finally enters nasolacrimal duct, forms lacrimal passage outflow system, any link of which shows blockage, which can cause lacrimal passage obstruction. The main reasons are as follows: 1. Congenital atresia or stenosis of lacrimal punctum causes lacrimal punctum obstruction, which can cause lacrimal passage obstruction;2. Inflammation, trauma, tumor, foreign body, toxic drugs and other damage to lacrimal passage system can cause obstruction. Lacrimal passage blockage suggested surgical treatment, such as lacrimal punctum incision, lacrimal punctum recanalization or lacrimal sac nasal surgery, open lacrimal passage treatment lacrimal passage blockage