Dogs Watery Eyes
Watery eyes are a common reason dog owners seek veterinary advice. From occasional mild tearing to chronic overflow that stains the fur, this symptom can be a normal variation or an indicator that something requires attention.
Quick Answer
Watery eyes in dogs can be caused by excessive tear production from irritation, allergies, or infection, or by impaired drainage due to blocked tear ducts, eyelid abnormalities, or facial anatomy. Mild, clear tearing without other signs may be manageable at home, but persistent or worsening tearing accompanied by redness, pain, or thick discharge should be evaluated by a veterinarian.
SYMPTOM TRIAGE
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What Can This Symptom Look Like?
Watery eyes encompass a broad spectrum of presentations. Understanding what is normal and what may be concerning is the first step.
Mild to Moderate Tearing
- Wetness at the inner corners of the eyes, visible after the dog wakes up or has been active.
- Slight dampness on the fur beneath the eyes that dries on its own.
- Intermittent tearing that comes and goes, possibly linked to specific activities or environments.
Chronic or Heavy Tearing
- Constant overflow of tears that runs down the face, soaking the fur.
- Persistent tear staining that leaves reddish-brown streaks, especially noticeable in white or light-coated breeds.
- Skin changes beneath the eyes, including redness, crusting, or a yeasty odor due to chronic moisture.
- Accompanying signs such as redness of the sclera, squinting, pawing at the eyes, or nasal discharge.
What May Be Associated With This Symptom?
The causes of watery eyes in dogs can be grouped into two main categories: those that increase tear production and those that reduce tear drainage.
Causes Related to Increased Tear Production
Allergies
Environmental allergens are among the most common causes of excessive tearing in dogs. Pollen, grass, mold, dust mites, and other airborne particles can trigger an inflammatory response in the conjunctiva, leading to increased tear production. Allergic tearing is typically bilateral and may be accompanied by sneezing, face rubbing, and itchy skin.
Infections
Bacterial or viral infections of the eye can cause inflammation and increased tear production. Conjunctivitis from infection may produce clear to yellowish discharge and is sometimes associated with respiratory signs. Canine distemper virus, though now rare due to vaccination, can also cause significant eye discharge.
Foreign Bodies and Irritants
Dust, sand, grass awns, small insects, or plant material that contacts the eye surface can trigger reflex tearing. Dogs that spend time outdoors, especially in windy or dusty conditions, are particularly susceptible.
Corneal Disease
Conditions affecting the cornea, including scratches, ulcers, and keratitis (corneal inflammation), can stimulate excessive tearing. Dry eye (keratoconjunctivitis sicca) may also cause reflex tearing as the eye attempts to compensate for poor lubrication.
Causes Related to Impaired Tear Drainage
Blocked Tear Ducts
The nasolacrimal duct drains tears from the eye into the nasal cavity. Blockages from inflammation, scarring, mucus plugs, or congenital abnormalities can prevent normal drainage, causing tears to overflow onto the face.
Eyelid Abnormalities
Structural problems with the eyelids can disrupt the normal tear film. Entropion (inward-rolling eyelids) causes eyelashes to rub against the eye, irritating it and increasing tear production. Ectropion (outward-rolling eyelids) can expose the conjunctiva and prevent tears from being properly spread across the eye surface.
Breed-Related Anatomy
Brachycephalic (flat-faced) breeds such as Pugs, Bulldogs, and Shih Tzus often have abnormally shallow eye sockets and compressed tear drainage systems. Breeds with prominent, protruding eyes (such as Pomeranians and Cavalier King Charles Spaniels) may have increased exposure to the environment, leading to more frequent irritation.
What Should the Pet Owner Monitor?
A structured approach to observation helps the veterinarian determine the likely cause and the best course of action.
Tracking the Symptom
- Pattern: Does the tearing happen at specific times (after walks, in the morning, during certain seasons) or is it constant?
- Laterality: Is one eye more affected than the other, or are both eyes equally watery?
- Discharge character: Is the fluid clear and thin, or does it contain mucus, pus, or blood-tinged material?
- Associated signs: Look for redness, squinting, cloudiness of the cornea, changes in pupil size, or swelling around the eye.
Environmental Factors
- Seasonal changes: Tearing that worsens in spring or fall may be linked to seasonal allergies.
- Indoor environment: Dust, cigarette smoke, air fresheners, or recently cleaned carpets may contribute.
- Outdoor activities: Running through tall grass, swimming, or playing in sandy areas can introduce irritants.
What Can the Owner Safely Do Next?
Daily care and observation can help manage mild tearing and provide useful information for the veterinarian.
Home Care
- Clean the eye area: Use a soft, damp cloth or cotton ball with sterile saline or warm water. Wipe gently from the inner corner outward. Clean once or twice daily for dogs with chronic tear staining.
- Keep the face dry: After cleaning, gently pat the area dry to prevent moisture from sitting on the skin.
- Address environmental factors: Reduce exposure to known irritants. Use air purifiers indoors and wipe the dog's face after outdoor activities.
- Regular grooming: Keep facial hair trimmed, especially around the eyes, to reduce the chance of hair irritating the eye surface.
When Home Care Is Not Enough
If the tearing persists despite home care, worsens over time, or is accompanied by other signs, a veterinary examination is the appropriate next step. A veterinarian can perform tests such as a fluorescein stain (to check for corneal ulcers), a Schirmer tear test (to measure tear production), and nasolacrimal duct flushing.
When to Contact a Veterinarian
Seek Emergency Care If You Observe
- Sudden onset of heavy bleeding from the eye
- A visible foreign body embedded in the eye
- The eye is swollen shut, bulging, or appears to be ruptured
- The dog is in extreme pain, vomiting, or unable to see
Schedule a Veterinary Appointment If
- Tearing has been present for more than a few days without improvement
- There is persistent redness or squinting alongside the tearing
- Discharge has changed from clear to thick, colored, or foul-smelling
- Tear staining is causing skin irritation or infection
- The dog shows other signs such as sneezing, nasal discharge, or facial rubbing
Frequently Asked Questions
Is it normal for dogs to have watery eyes?
Some tearing can be normal, especially in breeds with prominent eyes or flat faces. However, a change in the amount or character of tearing, or the presence of other signs such as redness or discomfort, may indicate an issue that should be evaluated.
Can I use human eye drops on my dog for watery eyes?
No. Many human eye drops contain ingredients that can be harmful to dogs or may not address the underlying cause. Always consult a veterinarian before applying any medication to your dog's eyes.
How do veterinarians diagnose the cause of watery eyes in dogs?
Veterinarians may use a combination of eye examination, fluorescein staining, Schirmer tear testing, nasolacrimal duct flushing, and sometimes blood tests or imaging to determine the cause of persistent watery eyes.
Will tear staining go away on its own?
Tear staining itself may improve if the underlying cause of excessive tearing is resolved. In some cases, even with treatment, mild staining may persist as a cosmetic issue. Regular cleaning can help manage it.
SYMPTOM TRIAGE
Whether your dog's watery eyes are new or ongoing, our symptom triage tool can help you assess the situation and provide general guidance on the most appropriate 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."