Symptoms of blocked tear ducts in dogs:

1. Tears will overflow from the edge of one or both eyelids, and traces or accumulation of brown tears can be seen under the inner corners of the eyes. Thick discharge.

2. If the skin of the affected area is soaked with tears for a long time, eczema and severe tear marks may occur.

Measures to prevent and treat tear duct obstruction in dogs:

1. For congenital punctal atresia that causes epiphora in dogs, punctal reconstruction surgery can be performed.

2. In order to eliminate foreign bodies or inflammatory products that may exist in the dog's tear duct, use saline containing penicillin for strong tear duct irrigation.

3. For stubborn lacrimal duct stenosis or obstruction, nasolacrimal duct intubation can be performed to permanently expand the narrow part of the lacrimal duct. If the tumor is compressed by the tumor, the tumor must be removed.