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What Is Lacrimal Probing (Infant)?

Infant lacrimal probing is a procedure that opens a blocked tear duct in a baby. Many babies are born with a drainage pathway that is not fully open yet, which can cause constant watery eyes. You may also see mucus or crusting because tears are not draining normally. Probing uses a very thin instrument to gently clear the blockage so tears can flow into the nose. It is usually considered when symptoms persist despite home care like massage.

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What Is Lacrimal Probing (Infant)?

Infant lacrimal probing is a procedure that opens a blocked tear duct in a baby. Many babies are born with a drainage pathway that is not fully open yet, which can cause constant watery eyes. You may also see mucus or crusting because tears are not draining normally. Probing uses a very thin instrument to gently clear the blockage so tears can flow into the nose. It is usually considered when symptoms persist despite home care like massage.

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Why Do Babies Get Blocked Tear Ducts?

In many infants, the tear drainage system is still developing after birth. A thin membrane near the end of the duct can stay closed longer than expected. This can lead to tearing that looks like the eye is always ?wet.? Discharge can happen because tears sit longer on the eye surface.

When Is Probing Recommended?

Doctors often start with watchful waiting and gentle tear duct massage because many cases improve on their own. Probing may be recommended if tearing and discharge continue for months or if infections keep coming back. The timing depends on age, symptoms, and how severe the blockage seems. Your pediatric eye doctor will explain the plan that fits your child's case.

What Happens During the Procedure?

Probing is typically done with the baby kept comfortable and still, often using anesthesia in a controlled setting. The doctor gently passes a thin probe through the tear opening in the eyelid and into the duct. This helps open the pathway and may be followed by a small rinse to confirm flow. The procedure is usually quick, but setup and recovery time can add to the visit.

Recovery and Aftercare

Most babies recover quickly and can go back to normal routines soon. Your doctor may prescribe drops to reduce irritation and lower infection risk. Mild tearing or a small amount of blood-tinged tears can happen briefly after probing. Follow-up is important to confirm the tearing has improved and to discuss next steps if symptoms return.

FAQs on Lacrimal Probing (Infant)

Does my baby need anesthesia for probing?

Many infant probings are done with anesthesia so the baby stays safe and still. This helps the doctor work gently and precisely. The exact approach depends on age, clinic setup, and medical history. Your doctor will review safety and what to expect beforehand.

What age is best for probing?

There is not one perfect age for every child. Many doctors wait a bit because a lot of blocked ducts open on their own in the first months of life. Probing is often considered when symptoms persist beyond that early window or infections occur. Your doctor will tailor timing to your child's needs.

What are the risks?

Risks are usually low but can include irritation, minor bleeding, or infection. In some cases, the duct can narrow again, and symptoms may return. Rarely, additional procedures are needed to keep the duct open. Your doctor will discuss risk based on your child's exam.

What if tearing comes back after probing?

Sometimes a second treatment is needed, especially if the blockage is more stubborn. Options can include repeat probing, balloon dilation, or placing a small stent. Your doctor will decide based on symptoms and what they find on follow-up. The goal is steady drainage and fewer infections.

References

Blocked Tear Duct (Dacryostenosis). Children’s Hospital of Philadelphia. https://www.chop.edu/conditions-diseases/blocked-tear-duct-dacryostenosis. n.d.

Nasolacrimal Duct Obstruction in Children. American Academy of Ophthalmology (AAO). https://www.aao.org/education/disease-review/nasolacrimal-duct-obstruction-4. November 15, 2015.

Blocked Tear Duct (Nasolacrimal Duct Obstruction). Cleveland Clinic. https://my.clevelandclinic.org/health/diseases/17260-blocked-tear-duct-nasolacrimal-duct-obstruction. Updated January 19, 2024.

Tear-Duct Blockage. Kids Health. https://kidshealth.org/en/parents/tear-duct-blockage.html. Reviewed February 2023.


Blocked tear duct. Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/blocked-tear-duct/symptoms-causes/syc-20351369. August 18, 2025.