Congenital Nasolacrimal Duct Obstruction in Babies
What Is a Blocked Tear Duct?
Understanding what causes NLDO helps parents know what to expect and when to seek care. In most cases, the condition is mild and improves on its own during the first year of life.
The nasolacrimal duct is a small channel that carries tears from the eye down into the nose. In babies with NLDO, a thin membrane at the lower end of the duct did not open before or shortly after birth. When this membrane stays closed, tears cannot drain properly. They pool in the eye and spill down the cheek, often with sticky discharge collecting in the inner corner.
NLDO is one of the most frequent eye problems seen in infancy. It affects boys and girls equally and can occur in one eye or both. The good news is that the membrane at the bottom of the duct often opens on its own during the first year as the baby grows and the duct widens, and most infants never need a procedure.
As a baby's face develops during the first year, the duct gradually matures and the membrane typically breaks open. Daily massage by a parent can help encourage this process. Most families find that with consistent massage and good eyelid hygiene, the blockage clears without any additional treatment.
Signs Parents Notice at Home
The signs of a blocked tear duct are usually easy to spot, though they can sometimes be confused with other conditions. Knowing what to look for helps parents manage the condition calmly at home and recognize when something more serious may be happening.
The most common sign is tearing that occurs even when the baby is calm and not crying. Parents often notice matted lashes after sleep and a yellowish discharge collecting near the inner corner of the eye. The white of the eye usually stays clear and does not look red or inflamed.
Pink eye (conjunctivitis) causes redness in the white of the eye, puffiness in the lids, and often makes babies visibly uncomfortable. With NLDO, the eye typically appears white and calm between episodes of tearing. A baby with uncomplicated NLDO feeds and sleeps normally and does not seem bothered by the eye.
Some symptoms signal a more serious problem and should prompt a call to your eye doctor or pediatrician right away.
- A firm, tender, warm bump at the inner corner of the eye with redness or fever, which may indicate an infection of the tear sac called dacryocystitis
- Swelling spreading to the eyelid or cheek, or a baby who refuses to open the eye
- A bluish swelling at the inner corner in a newborn, especially with noisy breathing, which may suggest a tear duct cyst called a dacryocele
- A cloudy or enlarged-looking cornea, extreme sensitivity to light, or constant squeezing of the eye, which should be evaluated to rule out infant glaucoma
These findings are not typical of NLDO and require prompt professional assessment.
How We Confirm the Diagnosis
Diagnosing NLDO is usually straightforward and does not require any painful testing. Our team uses a combination of clinical observation and simple in-office techniques to confirm the blockage and check for any other conditions.
During the exam, we observe tearing patterns and gently press over the tear sac at the inner corner of the eye. If fluid or discharge comes back through the small opening on the eyelid margin called the punctum, that confirms a blocked duct. We also examine the eyelid position, the cornea, and the overall health of the eye.
A drop of harmless yellow dye is placed in each eye. After about five minutes, we check how much dye remains. When the duct drains normally, most of the dye clears quickly. When the duct is blocked, the dye lingers. The test is completely painless and takes only a few minutes.
Most babies do not require imaging. CT or MRI is reserved for unusual presentations, cases involving a cyst in the nasal cavity, or when prior surgery has not resolved the blockage. An ear, nose, and throat specialist may use a small nasal scope if a cyst at the lower end of the duct is suspected, particularly when a newborn is having difficulty breathing through the nose.
Managing NLDO During the First Year
For most infants, the first approach is conservative management at home combined with periodic check-ins with your eye doctor. Simple daily care handles the majority of cases successfully.
Crigler massage is a technique that helps open the membrane and encourage natural drainage. Performing it correctly improves its effectiveness.
- Wash your hands thoroughly and trim fingernails short before starting
- Place one fingertip on the small firm bump just below the inner corner of the eye, on the side of the nose where the tear sac sits
- Apply firm, steady downward and inward pressure toward the nose, using 5 to 10 strokes per session
- Repeat 2 to 3 times per day, often before feeds when the baby is calm
- Stop and call your doctor if the area becomes hot, very tender, or your baby develops a fever
Consistent daily massage gives the duct the best chance of opening naturally before the first birthday.
Discharge should be wiped away gently using a clean, warm, damp washcloth, moving from the inner corner of the eye outward. Use a fresh section of the cloth with each pass to avoid spreading bacteria. Avoid cotton balls or swabs near the eye, as loose fibers can cause irritation. A warm compress held over the eye for a minute or two can help soften stubborn crusts.
Antibiotic drops do not open the blocked duct. A short course may be prescribed if yellow-green discharge is accompanied by redness, suggesting a bacterial infection has developed on top of the blockage. Repeated or long-term use of antibiotic drops without a clear infection is not recommended and can disrupt the eye's normal bacterial balance. Steroid or decongestant drops are not used for NLDO unless specifically directed by your doctor.
Procedures When Conservative Care Is Not Enough
When symptoms persist beyond the first year or recurring infections become a problem, a procedure may be the right next step. Our Oculoplastic Surgeon evaluates each child individually to recommend the most appropriate approach based on age, anatomy, and history.
Probing is the most common first procedure for NLDO. A thin, smooth metal wire is gently passed through the duct to open the membrane, and the duct is then flushed with saline to confirm that fluid flows freely into the nose. The success rate for primary probing is high, and many children are symptom-free after a single treatment.
For most infants beyond the first few months, probing is performed at an outpatient surgery center under brief general anesthesia. The procedure itself takes about 10 minutes, and babies typically go home within an hour or two of waking up. In carefully selected younger infants, office-based probing with a topical anesthetic is sometimes an option.
When the duct is partly narrowed rather than fully sealed, a tiny balloon catheter can be passed into the duct and briefly inflated to widen the channel. Balloon dilation is often chosen for older toddlers, when the duct feels firm during a first probing, or when a prior probe did not fully resolve the blockage.
A soft silicone tube can be placed through the duct to keep the newly opened channel from scarring closed during healing. The tube is removed in the office after approximately 6 to 12 weeks. Stenting is particularly useful after a second procedure or when the duct is at higher risk of re-closing.
A small number of children, typically older or with anatomical differences, do not respond to probing, dilation, or stenting. For these cases, a procedure called dacryocystorhinostomy (DCR) creates a new drainage pathway directly from the tear sac into the nasal cavity. External DCR in children carries high reported success rates and is a well-established option for difficult or recurring blockages.
What to Expect After a Procedure
Recovery from probing and related procedures is generally quick and well-tolerated. Knowing what is normal in the days and weeks after treatment helps parents feel confident at home.
Pink-tinged tears or a brief small nosebleed are common on the day of probing. Most babies feed and sleep normally that same evening. If the baby seems uncomfortable, infant acetaminophen may be used according to your pediatrician's dosing guidance. The majority of babies return to their usual selves within 24 hours.
Tearing often improves noticeably within the first week as any swelling settles and the duct adjusts. Some babies continue to tear intermittently for a few weeks while the duct lining matures. Persistent heavy crusting beyond two weeks is worth a follow-up call to our office.
A small percentage of children experience re-blockage after a successful procedure. When this happens, the second procedure is typically combined with silicone stenting to keep the duct open during healing. Our team will guide you through the next steps if a follow-up procedure becomes necessary.
Frequently Asked Questions
Families often have practical questions beyond the basics of what NLDO is and how it is treated. These answers address the day-to-day decisions and concerns that come up most often.
The first birthday is generally used as a guideline because many ducts open in the final weeks of the first year. If your baby has had repeated eye infections, a tear sac cyst, or skin breakdown from constant tearing, earlier intervention may make more sense. For babies with mild tearing and no complications, a brief watchful period around the first birthday is reasonable, though this decision should be made with your eye doctor based on your child's specific situation.
Yes. The discharge that comes from a blocked tear duct is not contagious and does not put other children at risk. Letting caregivers know which eye is affected and showing them how to gently wipe discharge with a clean cloth is all that is typically needed. If the eye becomes red and the baby seems unwell, that is the time to keep the child home and contact us, as active conjunctivitis is handled differently from NLDO alone.
NLDO is not strongly genetic, but having one affected child does slightly raise the odds for future siblings. In practice, most families with one child who had NLDO have other children who are completely unaffected. There is nothing that can be done during pregnancy to prevent it, and there is no need to be alarmed if a second child develops similar symptoms.
Uncomplicated NLDO on its own rarely threatens vision. The more important concern is that some serious conditions, like infant glaucoma, can produce similar signs such as tearing and eye watering. This is why a thorough eye exam matters if your baby's symptoms include cloudiness of the eye, light sensitivity, or an eye that appears enlarged. These signs should never be attributed to a blocked duct without a proper examination.
Most babies can return to normal feeding, sleeping, and activity within a day of probing. Swimming and water play are typically restricted for a brief period as directed by your surgeon, but day-to-day care at home continues as usual. Your doctor will give you specific guidance about antibiotic drops and follow-up timing before you leave the surgical facility.
For many infants, doing nothing beyond massage is appropriate and results in natural resolution. The risk of watchful waiting in a healthy baby with no infections is generally low. However, recurring infections, skin irritation from constant tearing, and the rare development of a tear sac abscess are reasons to move toward a procedure rather than continuing to wait. Your doctor can help weigh those factors for your child specifically.
See Our Team for Your Baby's Tear Duct Concerns
Rhode Island Eye Institute offers specialized oculoplastic care for infants and children with blocked tear ducts, from first evaluation through any procedures that may be needed. Our Oculoplastic Surgeon brings decades of focused experience to even the most complex pediatric cases. If your baby has persistent tearing or discharge, we welcome you to schedule an evaluation at any of our locations serving Rhode Island and southeastern Massachusetts.