Runny Eyes in Dogs (Epiphora): Causes & When to See a Vet

Epiphora (excessive tearing) has many causes:

  • Allergies (pollen, dust, food)
  • Foreign body (debris, eyelash)
  • Infections (conjunctivitis – bacterial, viral, allergic)
  • Blocked nasolacrimal ducts
  • Congenital duct abnormalities
  • Dry eye (KCS) – reflex tearing
  • Systemic illness (rare: liver, neurologic)

Action

Veterinary exam is essential. Do not self-medicate. Treatment depends on cause: flushing, antibiotics, surgery for duct issues, tear stimulants for KCS, etc.

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