If you’ve ever watched your dog’s eyes well up with tears and wondered, “Why is this happening?”, you’re not alone. Watery eyes in dogs — also known as epiphora — are a common concern and can be caused by a range of things from harmless irritants to underlying health issues. Let’s break down what’s going on, what it might mean, and when you should take action.
What Is Epiphora?
“Epiphora” is the medical term for excessive tearing. Dogs naturally produce tears to keep their eyes clean and moist. Normally, those tears drain through tiny ducts in the corner of the eye into the nose. But if something disrupts this system — like irritation or a blockage — tears spill over onto the face, which you can see as watery eyes.
6 Common Reasons Your Dog’s Eyes Are Watering
1. Environmental Irritants
Just like humans, dogs can react to dust, wind, smoke, or pollen. These tiny particles can irritate the eye surface, triggering tear production as the body tries to flush them out.
2. Allergies
Allergies to grasses, pollen, household dust, or even certain foods can make a dog’s eyes water. You may notice watering in both eyes, often accompanied by sneezing or itching.
3. Blocked Tear Ducts
If the tear drainage system becomes clogged or malfunctions, tears can’t drain properly. Instead, they run down your dog’s face. This is more common in certain breeds with flat faces or shallow tear ducts.
Eye infections — bacterial, viral, or fungal — often cause yellow or green discharge and may be accompanied by swelling or pain.
Corneal ulcers (scratches on the surface of the eye) and glaucoma can also trigger excessive tears and should be checked by a vet right away.
5. Breed-Related Features
Some dogs — especially short-nosed breeds like Pugs, Bulldogs, or Shih Tzus — have eye structures that make tear drainage less efficient. In these dogs, watery eyes might be more common, even without disease.
6. Foreign Objects & Eye Trauma
Small objects like grass seeds, sand, or even tiny fibers can get into your dog’s eye and irritate it. When that happens, the eye produces extra tears to try to wash the object away.
How to Tell if It’s Serious
Watch for these signs — they may mean your dog needs veterinary care:
Eyes that stay watery for more than a day or two
Thick, yellowish, or green discharge
Redness or swelling
Pawing at the eyes, squinting, or sensitivity to light
Vision changes or cloudiness
If you notice any of these, it’s best to consult your veterinarian. Untreated eye problems can sometimes lead to more serious issues, including infections or vision loss.
Tips to Help Your Dog at Home
While a vet should diagnose the cause, here are a few things you can do:
Gently clean around the eyes with a damp, clean cloth.
Keep hair trimmed around the eyes to avoid irritation.
Reduce exposure to known allergens (like certain grasses or dust).
Always avoid using human eye drops or solutions — only use products recommended by a vet.
Final Thoughts
Watery eyes in dogs can be due to simple environmental factors, such as wind or dust, but they can also be a sign of allergies, infections, or other medical issues. By paying attention to other symptoms and talking with your vet when needed, you’ll help keep your pup’s eyes healthy and comfortable.
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