Definition

A blocked tear duct is a partial or complete blockage in the pathway that carries tears from the surface of the eye into the nose.

Alternative Names

Dacryostenosis; Blocked nasolacrimal duct; Nasolacrimal duct obstruction (NLDO)

Causes

Tears are constantly being made to help protect the surface of your eye. They drain into a very small opening (punctum) in the corner of your eye, near your nose. This opening is the entrance to the nasolacrimal duct. If this duct is blocked, the tears will build up and overflow onto the cheek. This occurs even when you are not crying.

In children, the duct may not be completely developed at birth. It may be closed or covered by a thin film, which causes a partial blockage.

In adults, the duct can be damaged by an infection, injury, or a tumor.

Symptoms

The main symptom is increased tearing (epiphora), which causes tears to overflow onto the face or cheek. In babies, this tearing becomes noticeable during the first 2 to 3 weeks after birth.

Sometimes, the tears may appear to be thicker. The tears may dry and become crusty.

If there is pus in the eyes or the eyelids get stuck together, your baby may have an eye infection called conjunctivitis.

Exams and Tests

Most of the time, the health care provider will not need to do any tests.

Tests that may be done include:

• Eye exam
• Special eye stain (fluorescein) to see how tears drain
• X-ray studies to examine the tear duct (rarely done)

Treatment

Carefully clean the eyelids using a warm, wet washcloth if tears build up and leave crusts.

For infants, you may try gently massaging the area 2 to 3 times a day. Using a clean finger, rub the area from the inside corner of the eye toward the nose. This may help to open the tear duct.

Most of the time, the tear duct will open on its own by the time the infant is 1 year old. If this does not happen, probing may be necessary. This procedure is most often done using general anesthesia, so the child will be asleep and pain-free. It is almost always successful.

In adults, the cause of the blockage must be treated. This may re-open the duct if there is not too much damage. Surgery using tiny tubes or stents to open the passageway may be needed to restore normal tear drainage.

Outlook (Prognosis)

For infants, a blocked tear duct will most often go away on its own before the child is 1 year old. If not, the outcome is still likely to be good with probing.

In adults, the outlook for a blocked tear duct varies, depending on the cause and how long the blockage has been present.

Possible Complications

Tear duct blockage may lead to an infection (dacryocystitis) in part of the nasolacrimal duct called the lacrimal sac. Most often, there is a bump on the side of the nose right next to the corner of the eye. Treatment for this often requires oral antibiotics. Sometimes, the sac needs to be surgically drained.

Tear duct blockage can also increase the chance of other infections, such as conjunctivitis.

When to Contact a Medical Professional

See your provider if you have tear overflow onto the cheek. Earlier treatment is more successful. In the case of a tumor, early treatment may be life-saving.

Prevention

Many cases cannot be prevented. Proper treatment of nasal infections and conjunctivitis may reduce the risk of having a blocked tear duct. Using protective eyewear may help prevent a blockage caused by injury.

References

Dolman PJ, Hurwitz JJ. Disorders of the lacrimal system. In: Fay A, Dolman PJ, eds. Diseases and Disorders of the Orbit and Ocular Adnexa. Philadelphia, PA: Elsevier; 2017:chap 30.

Olitsky SE, Marsh JD. Disorders of the lacrimal system. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 643.

Salmon JF. Lacrimal drainage system. In: Salmon JF, ed. Kanski's Clinical Ophthalmology. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 3.