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Epiphora can be caused by many things, the most common being chronic irritation of the eyes and an abnormality in the tear drainage system. A problem commonly mistaken for epiphora is a blocked tear duct. Normally, tears leave the eye by heading down a tear duct through the nasal passages. If the duct is clogged, however, the tears will drain over the lower lid and appear as excess tears. Common causes of epiphora include:
• Abnormalities of the eyelashes and eyelids
• Viral infection
Once your dog has been diagnosed your vet will likely prescribe medication in the form of drops that you can administer yourself. To avoid the steep prices often involved with prescription eye & ear care for pets talk to your vet about discount drug alternatives.