The most telling sign of a clogged tear duct is persistent watering in one eye that doesn’t seem tied to allergies, wind, or emotion. If your eye constantly waters, you notice sticky discharge collecting in the corner near your nose, or you keep getting pink eye in the same eye, a blocked tear duct is a likely explanation. Here’s how to recognize it and what to expect if you need treatment.
The Main Symptoms
A blocked tear duct prevents tears from draining normally into your nose, so they pool on the surface of your eye and spill over. The hallmark symptoms include:
- Excessive tearing in one eye (occasionally both), often enough to streak down your cheek throughout the day
- Mucus or pus discharge that collects along the lids and in the inner corner of the eye
- Crusting on the eyelids, especially after sleep
- Redness of the white part of the eye
- Recurring pink eye infections in the same eye
- Painful swelling near the inside corner of the eye, close to the bridge of the nose
- Blurred vision from the film of undrained tears sitting on the eye’s surface
The pattern matters more than any single symptom. Occasional watery eyes on a cold day are normal. A single eye that waters most days, collects gunk, and sometimes gets infected points toward a drainage problem rather than allergies or dry eye (which tends to affect both eyes equally).
Why Tear Ducts Get Blocked
Your tears follow a specific path: they’re produced above the eye, wash across its surface with each blink, then drain through two tiny openings (called puncta) at the inner corner of your upper and lower lids. From there, tears travel through narrow channels into a small sac near the bridge of your nose, then down through a duct that empties into the nasal cavity. That’s why your nose runs when you cry. A blockage anywhere along this route traps tears on the eye’s surface.
In adults, the most common cause is gradual narrowing of the duct over time, often linked to chronic low-grade inflammation. A narrow nasal canal and ongoing nasal or sinus inflammation are significant risk factors. Previous facial injuries, sinus surgery, nasal polyps, and certain long-term eye drops can also trigger blockages. The drainage openings themselves can shrink or scar shut, a condition that comes in several forms ranging from a pinpoint-sized opening to a complete membrane covering the punctum.
In newborns, clogged tear ducts are remarkably common. About one in nine babies is born with the condition, because a thin membrane at the bottom of the duct hasn’t fully opened yet. This membrane remains intact in up to 70% of newborns at birth, though most open on their own within days or weeks. Only about 5% of infants develop noticeable symptoms.
How It’s Diagnosed
An eye doctor can usually confirm a blocked tear duct with a simple in-office test. A drop of yellow-orange fluorescein dye is placed on the surface of your eye. You blink a few times to spread it, and after about five minutes the doctor checks how much dye remains using a blue light. In a healthy drainage system, the dye disappears quickly into the nose. If it’s still pooled on your eye after five minutes, the drainage pathway is obstructed.
If the doctor needs to pinpoint exactly where the blockage sits, they may flush sterile saline through the drainage opening. When saline flows freely into the nose, the system is open. When it backs up or doesn’t pass through at all, the location and resistance help identify the problem area. Imaging is rarely needed with modern exam techniques, but in complex cases, a contrast dye can be injected and visualized on a scan to map the exact site of obstruction.
When a Blockage Becomes an Infection
Stagnant tears sitting in a blocked sac create a breeding ground for bacteria. When the sac itself gets infected, a condition called dacryocystitis, symptoms escalate noticeably. You’ll develop a tender, red lump at the inner corner of the eye near the bridge of your nose. The area may become warm and swollen enough to partially close the eye, and thick pus can drain from the lump or seep out of the puncta when you press near it. This is different from the mild, chronic watering of an uncomplicated blockage, and it needs prompt treatment with antibiotics.
Recurring infections in the same eye are one of the strongest clues that a tear duct blockage is the underlying issue. If you’ve been treated for pink eye multiple times in the same eye, it’s worth asking about a possible drainage problem.
What Can Look Like a Blocked Tear Duct
Several other conditions cause watery eyes, which is why the pattern of symptoms matters. Allergies typically affect both eyes and come with itching and sneezing. Dry eye syndrome, counterintuitively, causes excessive tearing as a reflex response, but it also produces a gritty, burning sensation and affects both eyes. A condition called ectropion, where the lower eyelid turns outward away from the eye, pulls the drainage opening out of position so tears can’t enter it. This mimics a blockage but has a visible eyelid problem as the root cause. Your doctor can distinguish between these during a standard eye exam.
Treatment for Adults
If a blockage is partial, warm compresses and gentle massage over the inner corner of the eye can sometimes improve drainage enough to manage symptoms. For complete blockages, the definitive treatment is a surgical procedure that creates a new pathway between the tear sac and the inside of the nose, bypassing the blocked duct entirely. The surgery has excellent outcomes, with success rates of 90 to 95% for the traditional approach. Some surgeons perform it through the nose using an endoscope, which avoids an external incision and achieves comparable results in many cases.
Surgery is typically recommended when the blockage causes chronic watering that interferes with daily life, repeated infections, or when probing and flushing confirm a complete obstruction that won’t resolve on its own. Recovery generally involves a week or two of mild swelling and congestion, with full healing over several weeks.
Treatment for Babies
Most infant tear duct blockages resolve without intervention as the drainage system matures during the first year of life. In the meantime, a simple massage technique can help. Place the tip of your index finger against the side of your baby’s nose, right in the inner corner of the affected eye. Press firmly and make short downward strokes, three to five per session. Repeat this three times a day: morning, midday, and night. The gentle pressure helps push open the membrane blocking the bottom of the duct.
If the blockage persists beyond 12 months, a doctor may recommend probing the duct under brief anesthesia, a quick procedure that opens the membrane mechanically. More involved surgery is reserved for the small number of cases where probing doesn’t work.