How is the lacrimal sac blockage formed

The causes of lacrimal sac blockage include congenital factors, infection, trauma, etc.

1. Congenital factors

Hasner valve residue or mucosal fold occlusion at the end of the nasolacrimal duct are the most common causes of infant dacryocystitis. Congenital lacrimal duct occlusion is often accompanied by congenital abnormalities of the lacrimal punctum, lacrimal canaliculus and nasolacrimal duct.

2. Infected

nasolacrimal duct inflammation and dacryocystitis are common infectious diseases of the lacrimal sac, which can lead to congestion, swelling of the lacrimal sac mucosa, secretion retention, and further blockage. Chlamydia trachomatis, gonococcus and other infections may also cause inflammation of the lacrimal duct, resulting in blockage.

3.

Trauma of the lacrimal sac area, such as surgery, trauma, etc., may lead to lacrimal duct structure damage, resulting in lacrimal sac blockage. Eyeball penetrating injury can directly damage lacrimal duct, leading to infection and blockage.