A rabbit's nasolacrimal duct (tear duct) connects the eye to the nasal passage — when it becomes blocked, tears overflow onto the face, causing chronic wet fur, skin scalding, and secondary infection. Dental disease is the most common underlying cause. Treatment addresses both the blockage and the root cause.
Last reviewed: June 2026
What Is Nasolacrimal Duct Obstruction in Rabbits?
The nasolacrimal duct is a narrow channel that drains tears from the inner corner of the eye down into the nasal cavity. In rabbits, this duct follows an unusually tortuous path through the maxillary bone, passing in close proximity to the roots of the upper incisor and cheek teeth. This anatomy makes rabbits uniquely susceptible to duct obstruction — especially when dental disease distorts the surrounding bone.
When the duct is blocked, tears cannot drain normally and overflow onto the face (epiphora), producing a persistent wet streak below the eye. The constant moisture irritates the skin, leading to fur loss, dermatitis, and bacterial or fungal infection of the periocular skin — a condition called "weeping eye" by many rabbit owners.
As described in Quesenberry & Carpenter's Ferrets, Rabbits & Rodents, nasolacrimal duct disease is one of the most commonly diagnosed ophthalmic conditions in pet rabbits, second only to conjunctivitis, and dental disease is implicated in the majority of cases.
Signs to Watch For
- Chronic epiphora — continuous tear overflow, wetting the fur below the inner eye corner
- White or cream-colored discharge that dries to a crust around the eye
- Fur loss and reddened, irritated skin in the damp area
- Skin fold dermatitis or moist dermatitis — the wet area becomes secondarily infected with bacteria or yeast
- Ocular discharge ranging from clear to purulent
- Conjunctival redness — the white of the eye looks pink
- Facial swelling below the eye if a periapical abscess (tooth root abscess) is forming
The eye itself is often comfortable unless conjunctivitis or corneal involvement is present. Unlike cats with upper respiratory infections, a rabbit with a blocked tear duct is typically otherwise bright and eating normally — at least initially.
Common Causes
- Dental disease (most common) — elongated tooth roots, molar spurs, and incisor malocclusion compress or distort the duct as it passes through bone. Lop-eared breeds and dwarf breeds are especially predisposed due to skull compression
- Dacryocystitis — bacterial infection of the tear sac itself; Pasteurella multocida and Staphylococcus aureus are most frequently isolated
- Conjunctivitis — inflammation swells the duct opening
- Foreign body — bedding or hay particles can enter the punctum (tear duct opening at the eye)
- Congenital narrowing — some rabbits have anatomically narrow ducts from birth
Diagnosis
Your exotic vet will diagnose the condition through a combination of:
- Fluorescein dye test — a drop of fluorescein placed in the eye should appear at the nose within 5–15 minutes in a healthy rabbit; failure confirms obstruction
- Duct flushing (dacryocystorhinography) — a fine cannula is inserted into the punctum and saline is flushed; resistance, discharge expression, or absence of nasal drip confirms obstruction site
- Skull radiographs or CT scan — essential to evaluate tooth root elongation, periapical abscesses, and bone involvement; CT is superior and increasingly available at exotic veterinary practices
- Culture and sensitivity — of any purulent discharge to guide antibiotic selection
- Complete oral examination under sedation — to assess incisor and molar alignment and identify dental disease requiring treatment
The AEMV Pet Care Guides (2024) note that rabbit dental disease and ocular disease are so frequently co-occurring that any rabbit presenting with epiphora should have a thorough oral examination regardless of the apparent primary complaint (AEMV Pet Care Guides, 2024).
Treatment
Treatment is two-pronged: relieve the blockage and address the underlying cause.
Duct flushing: Under sedation, the duct is flushed with saline (and sometimes dilute antibiotic solution) to clear debris, mucus, and pus. This provides temporary relief and can be repeated regularly in cases where the underlying cause cannot be fully corrected.
Treating dacryocystitis: Systemic antibiotics are selected based on culture results. Trimethoprim-sulfa, enrofloxacin, or azithromycin are commonly used. Topical ophthalmic antibiotic drops help manage conjunctival infection.
Addressing dental disease: Molar spurs are filed or burred under anesthesia. Incisor malocclusion may require repeated trimming or, in severe cases, surgical extraction of the incisors. As described in Quesenberry & Carpenter's Ferrets, Rabbits & Rodents, teeth extraction can dramatically reduce duct compression and epiphora in appropriately selected cases — though recurrence of dental disease and duct obstruction is common in predisposed breeds.
Skin care: The periocular skin must be kept clean and dry. Gently clean with saline-moistened gauze daily; antifungal or antibacterial creams treat established dermatitis. Petroleum jelly or a veterinary moisture barrier product can protect the skin between cleanings.
Prognosis: Complete cure is difficult when dental disease is the underlying cause — blocked ducts often recur as dental disease progresses. Regular duct flushing (every 1–3 months) combined with ongoing dental care provides good quality of life in most affected rabbits.
When to See a Vet
Call your vet today if:
- Your rabbit has persistent wet or crusty fur under one or both eyes
- There is discharge from the eye that is yellow, white, or cream-colored
- The skin below the eye is red, raw, or losing fur
Go to the ER immediately if:
- Your rabbit has a painful, swollen eye or cannot open it
- There is a rapidly growing lump on the face below the eye (possible abscess)
- Your rabbit has stopped eating or is showing signs of GI stasis alongside eye symptoms
What's going on with your pet?
Describe symptoms or snap a photo. Voyage tells you urgency, home care, and whether you need a vet.
First, tell us about your pet
Breed and age make a real difference in how Voyage interprets symptoms.
Describe the symptoms
Love it? See everything Voyage can do
Frequently Asked Questions
Why do lop rabbits get blocked tear ducts more often? Lop breeds have a flattened, compressed skull that distorts the path of the nasolacrimal duct and crowds the tooth roots into a smaller space. This anatomical compression makes duct obstruction and dental disease far more prevalent in lops than in longer-snouted breeds. Lop owners should schedule biannual exotic vet check-ups.
How much does rabbit tear duct treatment cost? An initial consultation with fluorescein test and duct flush under sedation costs $200–500 at most exotic practices. Skull radiographs or CT add $200–600. Dental treatment (molar burring) under anesthesia runs $300–700. Ongoing duct flushing every few months costs $150–300 per session. Total first-year costs including dental work can range $800–2,500.
Can I treat my rabbit's weeping eye at home? You can gently clean the area with warm saline-moistened gauze to prevent skin damage, but this only manages the symptom. The underlying duct blockage and any dental disease require professional diagnosis and treatment. Leaving it untreated leads to worsening skin infection and allows dental disease to advance silently.
Is the blocked tear duct painful for the rabbit? The epiphora itself causes discomfort mainly through skin irritation. If dacryocystitis (infection of the tear sac) is present, there is likely some local pain. Dental disease causing the obstruction can be significantly painful, even when a rabbit's stoic nature masks the signs. Chronic quiet behavioral changes (reduced grooming, less interest in hay) may signal underlying discomfort.
Can nasolacrimal duct obstruction go away on its own? Occasionally, minor blockages from temporary inflammation clear with antibiotic treatment alone. However, most cases in rabbits have a structural or dental basis that does not resolve without intervention. Early treatment produces the best outcomes.
Still Not Sure if Your Rabbit Needs a Vet?
When you're not sure if this is wait-and-see or call-tonight, Voyage AI Vet triages in under 2 minutes. Describe what you're seeing in chat, share photos of your rabbit's eye discharge, wet fur, or facial swelling, or hop on a live video call if you want a second pair of eyes. Every answer comes with citations to the actual veterinary literature it's pulling from — so you see exactly where the guidance comes from, not just a chatbot's word.