Free Guide to Understanding Clogged Tear Ducts

What Are Tear Ducts and How Do They Work?

Tear ducts are tiny tubes in your eyes that drain tears away from the surface of your eye into your nose. Most people don't realize they have tear ducts until something goes wrong with them. Your eyes produce tears constantly—not just when you cry. These tears keep your eyes moist, protect them from dust and germs, and help you see clearly. Without tear ducts working properly, tears would just sit on your eye surface and make vision blurry.

The tear drainage system is more complex than many people think. It starts at the inner corner of your eye, near your nose. There are two small openings called puncta (plural of punctum) in your upper and lower eyelids. These openings are where tears enter the drainage system. From there, tears flow into small tubes called canaliculi. These tubes lead to a larger reservoir called the lacrimal sac, which sits between your eye and your nose. From the lacrimal sac, a duct called the nasolacrimal duct carries tears down into your nasal cavity. This is why your nose runs when you cry—the tears are draining through this system into your nose.

The entire tear drainage system is about the width of a human hair. Because the tubes are so small, even tiny blockages can cause significant problems. The system relies on both gravity and the blinking motion of your eyelids to keep tears moving. When you blink, the muscles around your eye squeeze gently and help push tears through the ducts. This means that tear drainage depends on having healthy eyelids that blink normally.

Several factors keep this system working properly. The tear ducts need to be open and unobstructed. The tissue lining the ducts must be healthy and not inflamed. Your eyelids need to blink properly to create the pumping action that moves tears along. If any part of this system malfunctions, tears can back up and cause discomfort. Understanding this basic anatomy helps explain why clogged tear ducts happen and what symptoms they cause.

Practical takeaway: Tear ducts are drainage tubes no wider than a hair that move tears from your eye surface into your nose. When these tiny tubes work correctly, you don't notice them at all. They require being open, healthy, and supported by normal blinking to function properly.

Common Signs and Symptoms of Clogged Tear Ducts

The symptoms of a clogged tear duct can vary depending on whether the blockage is partial or complete, and whether an infection has developed. Many people experience symptoms in just one eye, though both eyes can be affected. The most obvious sign is excessive tearing, which seems strange since the problem involves drainage. When a tear duct is blocked, tears cannot drain properly, so they overflow onto your cheek instead. You might notice your eye feels constantly wet or that tears run down your face even when you're not emotional.

Another common symptom is a sticky discharge or crust around your eye, particularly in the morning. This discharge may be clear and watery, or it might be thicker and yellowish. Some people describe it as crusty buildup on the eyelashes. You might also experience redness in the white part of your eye or along the inner corner where the tear duct opening is located. The area around your eye might feel itchy or irritated. These symptoms happen because tears are sitting on your eye surface longer than normal instead of draining away.

Pain or tenderness near the inner corner of your eye, between your eye and nose, can indicate a clogged tear duct. This area might feel swollen or puffy. Some people describe a dull ache rather than sharp pain. In cases where an infection develops in the blocked duct, you might notice more significant swelling, warmth, or redness in this area. A condition called dacryocystitis, which is an infection of the tear sac, causes more severe symptoms including fever and significant pain.

Blurred or cloudy vision can occur because of the excess tears on your eye surface. This might come and go throughout the day. Some people notice that their vision clears up temporarily if they blink repeatedly or wipe away tears. The symptoms may be worse in cold weather or windy conditions, since these environments can increase tear production. Morning symptoms are often more noticeable because tears have accumulated overnight without draining.

It's important to note that symptoms of a clogged tear duct can overlap with other eye conditions. Dry eyes, allergies, infections, and eyelid problems can cause similar symptoms. This is why getting a proper examination from an eye care professional matters. They can determine whether your symptoms are actually caused by a blocked tear duct or by something else that needs different treatment.

Practical takeaway: Watch for excessive tearing, sticky discharge, redness, swelling, or discomfort at the inner corner of your eye. Morning symptoms and worsening in cold weather are common patterns. If these symptoms persist for more than a few weeks, contact an eye care professional for evaluation.

Why Tear Ducts Become Blocked

Tear ducts can become blocked for many different reasons. Understanding what causes blockages helps explain why this problem is fairly common. In infants, blocked tear ducts happen frequently because the tear drainage system may not fully develop before birth. Some babies are born with a thin membrane that hasn't opened at the end of the nasolacrimal duct. Estimates suggest that about 6 percent of newborns have a blocked tear duct in at least one eye. Most of these clear on their own by six months of age, though some persist longer and require medical intervention.

In older children and adults, the most common cause of blockage is inflammation or swelling of the tissue lining the tear ducts. Chronic eye infections or inflammations can scar the tissue inside the ducts, causing them to narrow. Sinusitis, allergies, and chronic rhinitis (inflammation of the nose) can all cause swelling that affects the tear drainage system. The tissue lining your tear ducts is continuous with the tissue lining your nose, so problems in one area affect the other. When your nasal passages are inflamed from allergies or infection, this swelling can extend into your tear ducts and block them.

Injuries to the eye area or face can damage tear ducts. This includes not just major trauma but also surgical procedures on the face or eyes. Procedures like cosmetic surgery on the eyelids, cataract surgery, or other eye surgeries can sometimes affect tear drainage if the ducts are damaged. Even aggressive eyelid surgery or procedures that weren't intended to touch the tear system can sometimes cause problems by altering eyelid position or function.

Age-related changes cause some blockages. As people get older, the tissue inside tear ducts can become less elastic and more prone to narrowing. Skin loses elasticity throughout the body with age, and the delicate tissue in tear ducts is no exception. Additionally, certain medical conditions can increase blockage risk. People with systemic sclerosis (a connective tissue disease) often develop blocked tear ducts because the disease affects tissues throughout the body. Some autoimmune conditions that cause dry eye also affect tear duct function.

Certain medications can contribute to blocked tear ducts. Medications that reduce tear production or cause dry eyes indirectly stress the drainage system. Topical eye medications, especially those used chronically, can sometimes cause inflammation or chemical buildup that affects drainage. Environmental factors play a role too. Dust, pollution, or exposure to chemicals can irritate the eyes and ducts. Smoking and secondhand smoke exposure increase inflammation throughout the eyes and nasal passages.

In some cases, tumors or growths in the nasal passages or around the eye can physically obstruct tear ducts. This is less common than inflammation-related blockages but does happen. Nasal polyps, which are benign growths in the nasal cavity, can obstruct the nasolacrimal duct where it opens into the nose. Structural problems with the nasal septum (the divider between nasal passages) can sometimes contribute to blockage by affecting normal drainage.

Practical takeaway: Blocked tear ducts result from inflammation, scarring, injury, age-related changes, or structural problems. Infants often have them due to incomplete development. In adults, infections, allergies, and sinus problems are common causes. Identifying what caused your blockage helps determine what treatment approach might work best.

How Eye Care Professionals Diagnose Clogged Tear Ducts