Excessive Tearing (Epiphora) in Dogs — Symptom Decision Guide

A calm, practical guide to understanding and assessing excessive tearing (epiphora) in dogs — causes, home checks, decision tree, when it's urgent and what to tell your vet.

Quick Assessment

• Is this an emergency?

• Most common cause: ocular surface irritation (foreign material, tear staining from conformation, allergies) and obstructed tear drainage in certain breeds.
• When to see a vet: persistent tearing >48 hours, any thick/yellow/green discharge, visible eyelid problems (rolled-in eyelids, additional lashes), or if the dog is in pain or losing vision.

What excessive tearing (epiphora) looks like

Epiphora is overflow of tears over the eyelid margin. Owners may notice:

• Wet fur below the eye, often with brownish staining (porphyrin) on light coats.
• Clear, watery tears vs. mucous or purulent (yellow/green) discharge.
• One eye affected or both. Many infectious causes start in one eye.
• Secondary signs: pawing at the eye, rubbing on furniture, squinting, redness, or crusting at the eyelid margins.

Possible causes (ranked by likelihood)

(References: Merck Veterinary Manual — ocular disease overview and breed-specific eye conditions.)

Quick decision tree (If [symptom] + [other sign] → likely [cause] → [action])

• If excessive tearing + clear, watery discharge + seasonal itching/sneezing → likely allergies → action: reduce allergen exposure; call vet for antihistamine guidance or topical therapy.
• If excessive tearing + hair or lashes rubbing the eye + frequent squinting → likely entropion or distichiasis → action: schedule vet/ophthalmology exam; surgery or focused eyelid therapy usually needed.
• If excessive tearing + thick yellow/green discharge + red conjunctiva → likely bacterial conjunctivitis → action: see vet for exam and topical antibiotic therapy.
• If excessive tearing + sudden onset + intense squinting + cloudy/white spot on cornea → likely corneal ulcer → action: emergency vet visit (corneal ulcers can progress quickly).
• If excessive tearing in a brachycephalic breed + wide exposed eye + no pain signs → likely conformational epiphora/tear overflow → action: discuss medical management and possible surgical options with your vet.
• If excessive tearing + eye stays closed for >12 hours or dog shows systemic signs (fever, lethargy) → likely severe infection/trauma → action: emergency veterinary assessment.

Home assessment steps (what to check and how to measure)

When It's an Emergency — clear red flags

Seek immediate veterinary care if you see any of the following:

• Severe squinting, eye closed, or the dog will not let you touch the head
• Corneal cloudiness, a visible white/gray spot, or a dark crater (possible corneal ulcer)
• Bleeding from the eye, or a visible laceration
• Sudden vision loss, bumping into objects
• Intense, persistent pain signs (yelping, shaking the head, refusal to eat)
• Systemic signs such as high fever (>103–104°F), severe lethargy, or collapse

When to Schedule a Vet Visit (non-urgent but needs attention)

Make a routine or urgent appointment (within 24–72 hours) if you notice:

• Persistent tearing >48 hours without obvious improvement
• Yellow or green discharge
• Recurrent or seasonal tearing that interferes with quality of life
• One eye consistently more affected than the other
• Visible eyelid changes (rolling inwards — entropion — or extra lashes) or chronic tear staining
• Changes in behavior like increased rubbing at the face

Home Care — safe things to do while monitoring

• Clean the area gently: use sterile saline or cooled boiled water (once cooled) on a clean gauze pad to wipe crust from the eyelid margin. Wipe from the inner corner outward.
• Warm compress: apply a warm (not hot) compress to the closed eye for 5–10 minutes 2–3 times daily to help comfort and loosen crust.
• Prevent trauma: use an Elizabethan collar (cone) to stop rubbing until you see the vet.
• Do NOT use over-the-counter topical corticosteroid drops or human eye medications unless directed by your veterinarian — they can worsen infections or corneal ulcers.
• If a small foreign body is visible and easily removed with irrigation, you can try flushing with sterile saline, but do not attempt deep probing or forceful manipulation.

Breed-specific notes: brachycephalic breeds (Pugs, Bulldogs, Shih Tzu, etc.)

• Brachycephalic dogs commonly have shallow orbits, wide palpebral fissures, excessive skin folds, and prominent eyes. These traits predispose them to tear overflow, exposure keratitis (corneal drying/irritation), and secondary infections.
• Tearing in these breeds is often chronic and may require long-term management: frequent eye cleaning, lubricating drops, medical therapy for surface inflammation, or corrective surgery (medial canthoplasty, eyelid tightening) when indicated.
• Discuss breed-associated risk with your vet or a veterinary ophthalmologist; corrective procedures can significantly reduce tearing and improve comfort.

What your vet may do or test

• Full ophthalmic exam (including slit lamp if available)
• Schirmer tear test (tear production)
• Fluorescein staining (to detect corneal ulcers)
• Conjunctival/ocular cytology or culture if infection suspected
• Nasolacrimal flushing to check for and treat blockage
• Referral to a veterinary ophthalmologist for eyelid surgery or advanced interventions

What to tell your vet (helpful information to prepare)

Bring or be ready to report:

• Onset: when you first noticed tearing and whether it was sudden or gradual
• Duration and frequency: intermittent vs. continuous; how long each episode lasts
• Which eye(s) affected and whether it’s one side more than the other
• Discharge description: color, thickness, odor
• Any trauma, recent grooming, or exposure to chemicals
• Any previous eye disease, surgeries, or known breed conditions
• Current medications, including topical eye drops and oral drugs
• Recent systemic illness or fever
• Photos or short video of the eye(s) can be extremely helpful for the vet

Final notes and resources

Excessive tearing is common and often not life-threatening, but it can be the first sign of a painful or sight-threatening condition. When in doubt, it’s better to have a professional examine your dog — rapid diagnosis and appropriate treatment improve outcomes.

Primary reference: Merck Veterinary Manual — ocular disease overview and breed-specific eye conditions (see Merck Veterinary Manual for veterinary ophthalmology topics).

If you want, I can provide a printable checklist for your home assessment or a short symptom log template to bring to the vet appointment.

Frequently Asked Questions