Why Are My Tear Ducts Swollen?
The honest verdict
This is usually not an allergy
Swollen tear ducts are rarely caused by allergies. The most common causes are a blocked tear duct or an infection of the tear sac (dacryocystitis), which produces localized pain, redness, and swelling at the inner corner of the eye. Allergic conjunctivitis can cause itchy, red, watery eyes, but it typically affects the whole eye surface rather than causing a distinct tender lump at the tear duct. If the swelling is accompanied by discharge, fever, or vision changes, an infection or other medical issue is likely.
This is a general research summary, not a diagnosis. It can't tell you what's causing your symptom — a clinician can.
Check this first
When swollen tear ducts is an emergency
Most of the time this can be handled calmly. But a few signs mean you shouldn't wait. Match what you're seeing to the right level of care below.
If any emergency sign below is present, call 911 or go to the ER now.
- Emergency
Swelling that spreads rapidly to the eyelid, cheek, or around the eye, especially with fever, chills, or vision changes — go to the ER (possible orbital cellulitis, a serious infection).
Call 911 or go to the ER now
- Emergency
Sudden vision loss, double vision, or difficulty moving the eye — call 911 (possible orbital infection or optic nerve involvement).
Call 911 or go to the ER now
- Urgent
Painful swelling with thick yellow or green discharge, fever, or redness spreading from the inner corner — seek urgent care or ER (dacryocystitis needing antibiotics).
Get seen today — urgent care or same-day visit
- Urgent
Swelling accompanied by severe headache, eye pain with nausea, or halos around lights — seek urgent care (possible acute glaucoma).
Get seen today — urgent care or same-day visit
- See a doctor
Swelling that does not improve after 2-3 days of warm compresses, or that keeps coming back in the same spot — see a clinician (possible chronic blockage or tumor).
Book a routine visit with a clinician
When in doubt, err toward getting seen. These tiers are a general guide, not a substitute for a clinician's judgment about your specific situation.
Key facts
Blocked tear ducts affect about 5-6% of newborns, but most resolve spontaneously within the first year of life.
Dacryocystitis (tear sac infection) is most common in adults over 40 and is more frequent in women than men.
Allergic conjunctivitis affects up to 40% of the population, but it typically causes diffuse eye itching and redness rather than localized tear duct swelling.
What's causing it
The same symptom can come from very different places. Here are the usual suspects for Inner corner of the eye (medial canthus) — the nasolacrimal drainage system that carries tears from the eye to the nose, tagged by mechanism and how common each one is — so you can see where an allergy actually fits.
Blocked tear duct (dacryostenosis)
The tear drainage system becomes partially or completely blocked, causing tears to pool and the tear sac to swell. This is common in newborns but can occur at any age due to injury, aging, or scar tissue. It often causes watery eyes and a mild swelling at the inner corner without pain unless infected.
Dacryocystitis (tear sac infection)
A bacterial infection of the lacrimal sac, usually from a blocked duct. It causes redness, swelling, warmth, and tenderness at the inner corner of the eye, often with thick discharge or pus. Fever may be present. This requires medical treatment with antibiotics and sometimes drainage.
Chalazion or stye near the inner corner
A blocked oil gland (chalazion) or infected eyelash follicle (stye) near the medial canthus can mimic tear duct swelling. These appear as a tender or painless lump on the eyelid margin and usually resolve with warm compresses over 1-2 weeks.
Allergic conjunctivitis with eyelid swelling
Seasonal or perennial allergies can cause diffuse eyelid swelling and redness, but the swelling typically involves the entire eyelid rather than forming a distinct tender lump at the tear duct. Itching is the hallmark symptom, along with watery discharge and sneezing.
Trauma or foreign body
An injury to the inner corner of the eye, or a small foreign object (dust, sand, eyelash) irritating the tear duct opening, can cause localized swelling and redness. The swelling usually resolves once the irritant is removed or the injury heals.
Is this an allergy? Usually, no
It's a common assumption, so it's worth being clear about — and pointing you toward what's more likely going on.
Swollen tear ducts are usually not an allergy. True eye allergies (allergic conjunctivitis) cause itching, redness, and watery eyes, but the swelling is diffuse across the eyelids and conjunctiva — not a localized tender lump at the tear duct. If you have a distinct swelling at the inner corner of the eye, especially with pain or discharge, a blocked tear duct or infection is far more likely than an allergic cause. Seasonal allergy sufferers may notice eye symptoms, but these typically affect both eyes equally and come with sneezing and nasal congestion.
Because an allergy is unlikely to be the driver, the most useful next step is a clinician who can look at the actual cause — not an allergy test.
Relief you can try at home
If your symptom is mild and you have no red-flag signs, these gentle steps often help. They soothe — they don't replace figuring out the cause.
- 1
Apply warm compresses
Soak a clean washcloth in warm water, wring it out, and hold it gently over the inner corner of the eye for 5-10 minutes, 3-4 times a day. This helps open the tear duct and drain any blockage.
- 2
Gently massage the area
With clean hands, use your index finger to gently massage the inner corner of the eye (near the nose) in a downward motion. This can help express blocked tears or pus. Stop if it causes pain.
- 3
Keep the area clean
Gently clean the inner corner of the eye with a clean, damp cotton ball or saline eye wash to remove any discharge. Avoid rubbing the eye, which can worsen irritation or spread infection.
- 4
Avoid eye makeup and contact lenses
Until the swelling resolves, stop using eye makeup and switch to glasses instead of contact lenses. This reduces irritation and prevents introducing bacteria into the area.
Stop any step that makes things worse. If the symptom isn't easing within a few days, check in with a clinician.
When to see a doctor
See a clinician if the swelling does not improve after 2-3 days of warm compresses, if you have thick discharge (yellow or green), fever, or redness spreading beyond the inner corner. Seek emergency care for rapid swelling of the eyelid or face, vision changes, difficulty moving the eye, or severe pain. Recurrent swelling in the same spot also needs evaluation to rule out a chronic blockage or other structural issue.
❓Frequently Asked Questions
Allergies rarely cause a swollen tear duct specifically. Allergic conjunctivitis causes redness, itching, and swelling of the eyelids and the white part of the eye, but it typically does not produce a distinct, tender lump at the inner corner. If you have a localized swelling right at the tear duct opening, a blockage or infection is much more likely than an allergy.
A blocked tear duct (dacryostenosis) is a blockage in the tear drainage system that causes watery eyes and mild swelling without infection. Dacryocystitis is an infection of the tear sac that develops when a blocked duct becomes infected — it causes redness, warmth, pain, and often thick discharge or pus. Dacryocystitis requires antibiotic treatment, while a simple blockage may resolve with warm compresses and massage.
Signs of infection include redness and warmth at the inner corner of the eye, tenderness or pain when touching the area, thick yellow or green discharge (pus), and sometimes fever. If you press gently and discharge comes out of the tear duct opening, an infection is likely. Infected tear ducts need medical evaluation and usually antibiotics.
A simple blocked or infected tear duct usually does not affect vision. However, if the infection spreads to the tissues around the eye (orbital cellulitis), it can cause vision changes, double vision, or difficulty moving the eye — these are emergencies. Any swelling accompanied by vision changes needs immediate medical attention.
A mild blockage may resolve within a few days to a week with warm compresses and gentle massage. An infected tear duct (dacryocystitis) usually improves within 24-48 hours of starting antibiotics, but the full course of treatment is needed. Chronic or recurrent swelling may require a minor procedure to open the blocked duct.
Medically reviewed by
Dr. Chet TharpeMD
Last reviewed July 2026
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Read moreThe best next step is a real clinician
This symptom is usually not driven by an allergy, so an allergy test won't give you the answer. A primary care doctor or the right specialist can examine what's actually going on and guide you from there.
Curex focuses on at-home allergy testing and immunotherapy, which isn't the right fit for this symptom — and never a substitute for medical care.
This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. It cannot tell you what is causing your swollen tear ducts or whether it is an allergy. If you have any emergency sign — trouble breathing, fast-spreading swelling, sudden weakness or confusion, or severe pain — call 911 or go to the nearest emergency room. For anything that is new, worsening, or persistent, see a licensed healthcare provider. Curex focuses on at-home allergy testing and immunotherapy, which is not the appropriate care for this symptom and never a substitute for a clinician.