Dogs usually have heavy tear stains, which are common when they eat human food for a long time, the nasolacrimal ducts are blocked, and the tears remain on the surface for a long time without being wiped clean. Therefore, in order to avoid the formation of tear stains, it is necessary to avoid eating human food and reduce excessive intake of oxides. Secondly, you need to use ophthalmic fluorescent dye to check whether the dog's nasolacrimal duct is unobstructed. If the nasolacrimal duct is not unobstructed, nasolacrimal duct surgery is required.

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Dogs with severe tear stains need to take oral antioxidant drugs, combined with eye drops, and massage the inner corners of the eyes on both sides. White or light-colored dogs are more concerned about tear stains.