Why Is My Dog's Eye Tearing?
Discover common causes and treatments for your dog's eye tearing, including allergies, infections, and preventive care tips.

When you notice your dog's eyes tearing more than usual, it can be worrying. Excessive tearing, also called epiphora, is a common issue that affects many dogs. Understanding why your dog's eyes are watering helps you provide the right care and comfort.
We will explore the main reasons behind eye tearing in dogs, how to recognize symptoms, and what treatments or preventive steps you can take. Knowing this information helps you keep your dog's eyes healthy and avoid complications.
Common Causes of Excessive Eye Tearing in Dogs
Excessive tearing in dogs can result from various underlying issues. Some causes are minor and easy to treat, while others may need veterinary attention. Identifying the root cause is key to managing the problem effectively.
Here are some of the most frequent reasons your dog’s eyes may be tearing excessively:
Allergies can irritate your dog’s eyes, causing increased tear production as a protective response to allergens like pollen or dust.
Eye infections, such as conjunctivitis, cause inflammation and discharge, leading to watery eyes and discomfort.
Blocked or narrow tear ducts prevent normal drainage, causing tears to overflow onto the face.
Foreign objects like dirt, hair, or small debris can irritate the eye surface, triggering excessive tearing to flush them out.
Understanding these causes helps you decide when to monitor at home or seek veterinary care for your dog’s eye tearing.
How Allergies Affect Your Dog’s Eyes
Just like humans, dogs can suffer from allergies that affect their eyes. Allergic reactions cause inflammation and watery eyes as the body tries to remove the irritants.
Common allergens include pollen, mold, dust mites, and certain foods. Dogs with seasonal allergies often show increased tearing during specific times of the year.
Allergic conjunctivitis causes redness, swelling, and watery discharge, making your dog uncomfortable and prone to rubbing their eyes.
Environmental allergens like grass or smoke can trigger eye irritation, especially in outdoor dogs or those exposed to secondhand smoke.
Food allergies sometimes cause systemic reactions that include eye tearing along with skin and digestive symptoms.
Identifying and minimizing exposure to allergens can reduce eye tearing and improve your dog’s overall comfort.
If you suspect allergies, your vet can recommend treatments like antihistamines or medicated eye drops to relieve symptoms safely.
Eye Infections and Their Impact on Tearing
Eye infections are a common cause of tearing in dogs. Bacterial, viral, or fungal infections can inflame the eye tissues, leading to excessive tear production and discharge.
Infections often require prompt veterinary treatment to prevent complications and relieve discomfort.
Conjunctivitis, or pink eye, causes redness, swelling, and watery or mucous discharge that can make your dog’s eyes look constantly wet.
Corneal ulcers or scratches increase tear production as the eye tries to heal and protect itself from further damage.
Infections may cause your dog to squint, paw at their eyes, or show signs of pain, indicating the need for veterinary care.
Early diagnosis and treatment with antibiotics or antifungal medications help clear infections and reduce tearing quickly.
Regular eye checks and hygiene can help prevent infections and keep your dog’s eyes healthy.
Blocked Tear Ducts and Tear Overflow
Tear ducts drain excess tears from the eyes into the nose. When these ducts are blocked or narrow, tears cannot drain properly and spill over the eyelids, causing visible wetness and staining.
This condition is common in certain breeds and can cause chronic tearing if untreated.
Breed predisposition: Breeds like Poodles, Maltese, and Bulldogs often have narrow or malformed tear ducts leading to persistent tearing.
Infections or inflammation can cause temporary blockage of tear ducts, increasing tear overflow until treated.
Injury or swelling near the eyes may compress tear ducts, preventing normal drainage and causing watery eyes.
Regular cleaning and veterinary evaluation can help manage blocked tear ducts and reduce staining around the eyes.
If tear duct blockage is severe, your vet may recommend flushing or minor procedures to restore proper drainage.
Foreign Bodies and Eye Irritation
Foreign objects in your dog’s eye can cause immediate irritation and excessive tearing. Dogs are curious and often get debris like grass seeds, dust, or hair trapped in their eyes.
Prompt removal of foreign bodies is important to prevent damage and infection.
Small particles scratch the cornea, triggering reflex tearing to wash them out and protect the eye surface.
Persistent irritation from a foreign body can cause redness, swelling, and discomfort, making your dog paw at their eyes.
If the object is not visible or easily removable, veterinary examination is necessary to avoid corneal ulcers or infections.
Keeping your dog’s face clean and checking their eyes after outdoor activities helps reduce the risk of foreign body irritation.
Always handle your dog gently when inspecting their eyes and seek professional help if you cannot safely remove debris.
Preventive Care to Reduce Eye Tearing
Preventing excessive tearing in dogs involves good hygiene, regular checkups, and managing environmental factors. Taking proactive steps helps keep your dog’s eyes healthy and comfortable.
Here are practical ways to reduce the risk of eye tearing and related problems:
Keep your dog’s face clean by gently wiping around the eyes daily with a damp cloth to remove dirt and discharge.
Avoid exposure to smoke, strong perfumes, or dusty environments that can irritate your dog’s eyes and cause tearing.
Schedule regular veterinary eye exams to catch early signs of infections, allergies, or tear duct issues before they worsen.
Use protective gear like dog goggles during outdoor activities if your dog is prone to eye irritation from wind or debris.
Consistent preventive care improves your dog’s eye health and reduces the frequency of tearing episodes.
When to See a Veterinarian for Your Dog’s Eye Tearing
While some eye tearing is normal, persistent or severe symptoms require veterinary attention. Early intervention prevents complications and ensures your dog’s comfort.
Watch for these signs that mean it’s time to visit the vet:
Continuous or worsening tearing that does not improve with home cleaning or care.
Redness, swelling, or discharge that is yellow, green, or thick, indicating infection.
Signs of pain such as squinting, pawing at the eye, or sensitivity to light.
Changes in vision, cloudiness, or any injury to the eye that may affect your dog’s sight.
Your veterinarian will perform a thorough eye exam, diagnose the cause, and recommend appropriate treatments to restore your dog’s eye health.
Conclusion
Excessive tearing in your dog’s eyes can stem from allergies, infections, blocked tear ducts, or irritation from foreign objects. Each cause requires different care approaches to relieve discomfort and prevent complications.
By understanding the reasons behind your dog’s eye tearing and practicing good preventive care, you can help maintain their eye health. Always consult your vet if symptoms persist or worsen to ensure your dog receives the best treatment.
FAQs
What home remedies can help reduce my dog's eye tearing?
Gently wiping your dog’s eyes with a damp, clean cloth can remove irritants and discharge. Avoid using human eye drops and keep your dog’s environment free from dust and smoke to reduce tearing.
Can diet affect my dog's eye tearing?
Yes, food allergies can cause eye irritation and tearing. If you notice tearing along with other allergy signs, consult your vet about possible dietary changes or hypoallergenic foods.
Is excessive tearing a sign of serious eye disease?
While tearing alone may not be serious, if it’s accompanied by redness, swelling, pain, or vision changes, it could indicate infections or injuries needing prompt veterinary care.
How do vets treat blocked tear ducts in dogs?
Veterinarians may flush the tear ducts to clear blockages or recommend minor procedures if needed. Treatment depends on the cause and severity of the blockage.
Can eye tearing be prevented in breeds prone to it?
Regular cleaning around the eyes, avoiding irritants, and routine vet checkups help manage and reduce tearing in breeds prone to tear duct issues or allergies.
