Why Is My Dog Watery Eyes?
Excessive tearing, also known as epiphora, is one of the most frequently noticed eye symptoms in dogs. While tears are a normal and necessary part of eye health, an overproduction or poor drainage can leave visible wet trails beneath the eyes and may signal an underlying issue.
Quick Answer
Watery eyes in dogs may result from overproduction of tears due to irritation, allergies, or infection, or from inadequate drainage caused by blocked tear ducts, anatomical abnormalities, or inflammation. Determining the cause requires observing accompanying signs, such as redness, discharge color, and whether one or both eyes are affected.
SYMPTOM TRIAGE
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What Can This Symptom Look Like?
Watery eyes can range from a slight increase in moisture at the inner corners to constant dripping that stains the fur beneath the eyes.
Common Presentations
- Clear, runny discharge that overflows onto the face, sometimes leaving reddish-brown tear stains, particularly in light-colored dogs.
- Damp fur around the eyes that may smell slightly if the area stays chronically moist.
- Occasional squinting or blinking more than usual, especially if the excess tearing is accompanied by mild irritation.
- Skin irritation beneath the eyes, where constant moisture can cause redness, crusting, or even localized infection.
Distinguishing Features
It is helpful to note whether the tearing is clear or contains mucus. Clear, watery discharge alone may suggest irritation or allergies, while thick, yellow, or green discharge can be associated with infection. The distinction helps guide the next steps.
What May Be Associated With This Symptom?
Excessively watery eyes in dogs can arise from several different mechanisms. Understanding these categories can help the owner narrow down what may be happening.
Overproduction of Tears
When something irritates the eye, the tear glands respond by producing more tears than normal. Common triggers include:
- Allergens: Pollen, mold, dust mites, and other environmental allergens can stimulate tear production as part of an inflammatory response.
- Foreign bodies: Even tiny particles of sand, grit, or plant material that are not visible to the naked eye can cause persistent watering.
- Conjunctivitis: Inflammation of the conjunctiva, whether from infection, allergies, or other causes, often leads to excessive tearing.
- Corneal irritation: Scratches, ulcers, or dry eye can paradoxically cause excessive tearing as the eye attempts to compensate for surface damage.
Poor Tear Drainage
Tears normally drain from the eye through small openings called puncta, located at the inner corners near the nose, into the nasal cavity. When this drainage system is compromised, tears overflow onto the face even if production is normal.
- Blocked tear ducts: Inflammation, infection, or congenital narrowing can block the nasolacrimal duct, preventing proper drainage.
- Anatomical factors: Brachycephalic breeds with flat faces (such as Pugs and Bulldogs) often have shallow eye sockets and abnormally positioned tear ducts, which can lead to chronic overflow.
- Eyelid abnormalities: Conditions such as entropion (inward-rolling eyelids) or ectropion (outward-rolling eyelids) can disrupt the normal pathway of tears across the eye surface.
Other Contributing Factors
- Distichiasis: Abnormal eyelashes that grow from the inner eyelid margin and rub against the eye surface can cause persistent irritation and tearing.
- Dry eye (Keratoconjunctivitis Sicca): Counterintuitively, dry eye can cause reflex tearing. The eye produces large volumes of poor-quality tears that do not adequately lubricate the surface, leading to a cycle of irritation and overflow.
What Should the Pet Owner Monitor?
Observing the context and pattern of the watery eyes can provide valuable information for the veterinarian.
Practical Observations
- Is the tearing in one eye or both? Unilateral tearing may suggest a local problem such as a blocked duct, foreign body, or scratch. Bilateral tearing may point to allergies or a systemic issue.
- Is there any redness? Red, watery eyes may indicate inflammation or infection, while clear, watery eyes without redness can sometimes be related to drainage issues.
- Has the tear staining changed? An increase in the size or darkness of tear stains may indicate worsening drainage or increased tear production.
- Are there other signs? Note any sneezing, nasal discharge, pawing at the face, or changes in the skin around the eyes.
What Can the Owner Safely Do Next?
While the underlying cause should be evaluated by a veterinarian, the owner can take some general steps to manage the symptom and keep the eye area clean.
Safe Home Measures
- Gently clean the eye area daily: Use a clean, soft cloth or cotton ball moistened with warm water or sterile saline to wipe away excess moisture and prevent tear staining.
- Keep facial fur trimmed: For breeds with long facial hair, keeping the hair around the eyes trimmed can reduce irritation and prevent hair from wicking moisture into the eye.
- Monitor for environmental triggers: If the tearing worsens during certain seasons, after cleaning the house, or after exposure to specific environments, note these patterns.
- Ensure proper grooming: Regular cleaning of the face and eye area can prevent secondary skin infections from chronic moisture.
What to Avoid
- Do not use human eye drops or products around the dog's eyes unless specifically recommended by a veterinarian.
- Do not attempt to flush or probe the tear duct openings at home.
- Avoid plucking or cutting eyelashes, as this can introduce infection or cause further irritation.
When to Contact a Veterinarian
Seek Emergency Care If You Observe
- Sudden, severe swelling of the eye or face
- Blood in the tears or a visible wound
- The dog is in obvious pain, pawing frantically, or unable to open the eye
- Sudden loss of vision or extreme light sensitivity
Schedule a Veterinary Appointment If
- Watery eyes have persisted for several days without improvement
- Tear staining is worsening or the skin beneath the eyes is becoming red and irritated
- There is a change in the character of the discharge (becoming thick, yellow, or green)
- The dog is also sneezing, rubbing the face, or showing other signs of allergy or discomfort
Frequently Asked Questions
Why does my dog have watery eyes but no other symptoms?
Clear, watery eyes without redness, pain, or thick discharge may indicate a drainage issue such as a blocked tear duct or an anatomical feature common in certain breeds. A veterinary examination can help determine the cause, even when other signs are absent.
Can tear stains be a sign of a medical problem?
Tear stains themselves are cosmetic, but the underlying cause of excessive tearing may be medical. If tear staining develops suddenly, worsens over time, or is accompanied by other symptoms, it is worth having a veterinarian evaluate the eyes.
Are certain dog breeds more prone to watery eyes?
Yes. Brachycephalic breeds (Pugs, French Bulldogs, Shih Tzus), breeds with prominent eyes (Pomeranians, Chihuahuas), and breeds with long facial hair (Maltese, Poodles) are more prone to watery eyes due to their anatomy or hair growth patterns.
Can allergies cause watery eyes in dogs?
Yes. Allergic conjunctivitis is a common cause of bilateral, clear, watery eyes in dogs. It may be seasonal or year-round and is often accompanied by other signs such as itchiness, ear infections, or skin irritation.
SYMPTOM TRIAGE
Not sure what is causing your dog's watery eyes? Our symptom triage tool can help you assess the signs and provide general guidance on the best next steps.
This tool does not diagnose conditions or replace a veterinarian.
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"This article and the PawAI Symptom Triage tool provide general information and cannot diagnose conditions or replace examination, diagnosis, or treatment by a licensed veterinarian. If you are concerned about your pet's health, contact a veterinarian promptly."