Dacryocystitis is an infection or inflammation of the lacrimal sac, the small pouch that collects tears before they drain into your nose. It happens when the nasolacrimal duct, the tiny channel connecting that sac to the nasal cavity, gets blocked. Tears pool, bacteria thrive, and the result is a painful, swollen lump beside the nose that can look alarming and feel worse. The condition ranges from a sudden, angry flare-up to a low-grade, months-long nuisance, and the path from diagnosis to resolution depends heavily on which form you have.
Why It Happens
Your eyes produce tears constantly, not just when you cry. Those tears wash across the surface of the eye, collect in the inner corner, and drain through two tiny puncta into the lacrimal sac, then down through the nasolacrimal duct into the nose. That is why your nose runs when you cry. When anything blocks that drainage path, tears stagnate in the sac and create an environment where bacteria can multiply rapidly.1Uva Clinical Anaesthesia and Intensive Care. Dacryocystitis: Multidisciplinary Insights into Etiology, Diagnosis, and Comprehensive Management
In adults, the blockage is usually acquired over time. The duct narrows from chronic low-grade inflammation, scar tissue, or age-related changes to the bony canal it passes through. Less commonly, a nasal polyp, sinus disease, or trauma pinches the duct shut. In newborns the problem is different: a thin membrane at the bottom of the duct that was supposed to open before birth simply did not.
Who Gets Dacryocystitis
Women are affected far more often than men. In a study from India, about three-quarters of patients were female, with most cases appearing between the third and sixth decades of life, and the condition was more common in people from rural areas and lower socioeconomic backgrounds.2PubMed Central. A prospective study on epidemiology of dacryocystitis at a tertiary eye care center in Northern India A more recent study looking specifically at acute dacryocystitis in adults found the average age at first episode was around 65, and the risk increased roughly 15% for every five years of age.3PubMed. Risk factors for the development of acute dacryocystitis in adults The female predominance is thought to relate in part to anatomy: women tend to have a narrower nasolacrimal duct to begin with.
Chronic dacryocystitis is actually more common than the acute kind. A large series from India that evaluated nearly 1,900 patients found about 70% had the chronic form, while roughly 30% presented with acute disease.4Eye. Comparative bacteriology of acute and chronic dacryocystitis
Acute Versus Chronic Forms
Acute dacryocystitis comes on fast. Over a day or two, the area next to the nose on the affected side becomes red, hot, swollen, and tender. Pus may ooze from the punctum if you press on the sac. You might have a fever. It hurts enough that most people see a doctor quickly, which is the right call.
Chronic dacryocystitis is subtler. The main complaint is usually persistent tearing, or epiphora, sometimes with a mucous discharge that makes the eye feel sticky. The swelling beside the nose may be modest or barely noticeable. People often tolerate it for months before seeking help, sometimes writing it off as allergies or an eye that “just waters.” The annoyance level is lower than the acute form, but the downstream consequences can be meaningful: people with chronic dacryocystitis score significantly worse than healthy controls on measures of eye-related quality of life, including ocular pain, difficulty with distance activities, and mental health domains related to vision.5PubMed Central. Vision-Related Quality of Life Outcomes Following Endoscopic Dacryocystorhinostomy in Chronic Dacryocystitis: A Prospective Cohort Study
The Bacteria Behind It
Staphylococcus aureus is the single most commonly isolated organism in acute dacryocystitis across multiple studies, typically accounting for roughly a fifth to a quarter of culture-positive cases.6Eye. Comparative bacteriology of acute and chronic dacryocystitis7PubMed Central. Microbiologic spectrum of acute and chronic dacryocystitis Pseudomonas aeruginosa often shows up as the second most common isolate in acute cases, which matters because Pseudomonas is naturally resistant to many first-line antibiotics.
In chronic dacryocystitis, the microbial landscape shifts. Coagulase-negative staphylococci, the milder skin-dwelling relatives of S. aureus, become the dominant group, followed by S. aureus and Streptococcus pneumoniae.8Eye. Comparative bacteriology of acute and chronic dacryocystitis A large Chinese study found Staphylococcus epidermidis as the single most common isolate overall, with a diverse supporting cast that included Corynebacterium, Haemophilus, and even occasional fungi like Candida.9PubMed Central. Microbiological isolates and associated complications of dacryocystitis and canaliculitis in a prominent tertiary ophthalmic teaching hospital in northern China
One observation worth highlighting: gram-negative bacteria play a bigger role in acute disease than in chronic. In one series, gram-negative species appeared in over half of acute cases but only about a fifth of chronic ones.10PubMed Central. Microbiologic spectrum of acute and chronic dacryocystitis This difference has practical implications for antibiotic selection.
Biofilms and Antibiotic Resistance
One reason chronic dacryocystitis can be so stubborn is that bacteria do not just float freely in the lacrimal sac. Scanning electron microscopy of lacrimal sac tissue from chronic dacryocystitis patients has revealed structures consistent with bacterial biofilms, communities of bacteria encased in a slimy matrix that shields them from both the immune system and antibiotics. In a pilot study, bacteria were found not only on the inner surface of the sac but embedded within the tissue itself.11PubMed. Is a bacterial biofilm in the lacrimal sac the cause of chronic refractory dacryocystitis? – A pilot study
Antibiotic resistance compounds the problem. One study of chronic dacryocystitis found that S. aureus was the most common isolate at about 46% of cases, and the vast majority of those S. aureus strains, upward of 93%, were methicillin-resistant (MRSA). About 72% of those MRSA isolates formed biofilms, and over half were resistant to three or more classes of antibiotics.12PubMed. High Prevalence of Biofilm-Forming MRSA in the Conjunctival Flora in Chronic Dacryocystitis That combination of biofilm formation and multi-drug resistance helps explain why antibiotics alone rarely cure chronic dacryocystitis. Surgery to restore drainage is almost always needed.
Unusual Pathogens
Most dacryocystitis is caused by common Staphylococcus and Streptococcus species, but atypical organisms occasionally show up and can make diagnosis tricky. Fungi, including Candida species, have been documented as primary agents of chronic dacryocystitis, sometimes without the dacryolith (a stone in the lacrimal sac) that clinicians traditionally associate with fungal infection.13PubMed. Atypical presentation of fungal dacryocystitis. A report of two cases Atypical mycobacteria and Nocardia have also been isolated from lacrimal infections, though these remain uncommon.14PubMed Central. Fungal, Mycobacterial, and Nocardia infections and the eye: an update
A recent case report described chronic dacryocystitis caused by Mycobacterium abscessus, a rapidly growing environmental mycobacterium that requires prolonged, targeted antibiotic therapy quite different from standard treatment.15PubMed. Chronic dacryocystitis due to Mycobacterium abscessus These cases are rare, but they underscore why obtaining cultures matters, especially when a patient fails standard treatment. If the wrong bug is being targeted, no amount of the right-sounding antibiotic will work.
What Happens If You Ignore It
Acute dacryocystitis is not something you want to ride out at home. The lacrimal sac sits in a confined bony groove right next to the orbit, and infection can spread. The most immediate risk is preseptal cellulitis, infection of the soft tissue in front of the thin membrane (the orbital septum) that separates eyelid tissue from the eye socket. Left untreated, this can cross that barrier and become orbital cellulitis, a far more serious condition that threatens vision.16Egyptian Journal of Ear, Nose, Throat and Allied Sciences. Orbital cellulitis secondary to dacryocystitis: Is it common?
In extreme cases, dacryocystitis-related orbital cellulitis has led to superior ophthalmic vein thrombosis, essentially a blood clot in a major vein draining the eye, which carries further risk of cavernous sinus thrombosis and meningitis.17PubMed. Superior ophthalmic vein thrombosis in a patient with dacryocystitis-induced orbital cellulitis These complications are rare, but they illustrate why acute dacryocystitis warrants prompt antibiotic treatment and close monitoring. A lacrimal abscess that is visibly pointing may need to be drained.
Treating Acute Dacryocystitis
Warm compresses and oral antibiotics are the first line for mild cases. If the infection is severe, with significant facial swelling, fever, or concern for orbital spread, intravenous antibiotics become necessary. Antibiotic choice should ideally be guided by cultures, though empiric therapy covering S. aureus and gram-negatives is the usual starting point while waiting for results.
The antibiotics treat the acute infection, but they do not fix the underlying blockage. Once the inflammation settles, most patients still have an obstructed duct, which means the infection will likely return. That is why definitive treatment usually involves surgery after the acute episode resolves, or in some centers, during it. A laser-assisted endonasal approach has been used during the acute phase to both drain the infection and create a permanent bypass in one step, avoiding the need for a second procedure later.18PubMed Central. The treatment of acute dacryocystitis using laser assisted endonasal dacryocystorhinostomy
Dacryocystorhinostomy and How to Choose an Approach
Dacryocystorhinostomy, or DCR, is the definitive surgical treatment for nasolacrimal duct obstruction in adults. The idea is simple: bypass the blocked duct entirely by creating a new opening directly from the lacrimal sac into the nasal cavity. There are two main ways to do it.
External DCR involves a small skin incision on the side of the nose. The surgeon removes a small piece of bone, then connects the lining of the lacrimal sac to the lining of the nose with sutures, creating a permanent drainage pathway. This procedure has been refined since the Italian surgeon Toti first described it in 1904, and its basic principle, anastomosing the lacrimal and nasal mucosa, has not changed much since Dupuy-Dutemps and Bourget refined the technique decades later.19PubMed. Origins of lacrimal surgery, and evolution of dacryocystorhinostomy to the present Success rates for external DCR are generally in the low-to-mid 80% range or higher.20PubMed Central. Long-Term Outcomes of External Dacryocystorhinostomy in the Age of Transcanalicular Microendoscopic Techniques
Endoscopic (endonasal) DCR achieves the same goal but approaches from inside the nose using an endoscope, leaving no external scar. For years, external DCR was considered the gold standard, but advances in endoscopic instruments have closed the gap. Head-to-head comparisons now find equivalent success rates between the two approaches, with anatomical success around 94% and functional success around 90% in comparative studies.21PubMed Central. Comparison of endoscopic and external dacryocystorhinostomy for treatment of primary acquired nasolacrimal duct obstruction Endonasal DCR tends to offer faster recovery, with symptom relief in under two weeks compared to nearly four weeks for external DCR, and patients report higher satisfaction, largely because there is no facial scar.22Saudi Journal of Ophthalmology. External versus endonasal dacryocystorhinostomy in a specialized lacrimal surgery center
In practice, the choice often comes down to the surgeon’s training and available equipment rather than one technique being objectively superior. Both work well, and the differences in outcomes have shrunk to the point where surgeon experience and patient preference are the deciding factors.23PubMed Central. External vs. endonasal dacryocystorhinostomy: has the current view changed?
Stents, Tubes, and Mitomycin C
During DCR, surgeons sometimes place a thin silicone tube through the new opening to keep it from scarring shut while it heals. This is particularly common in complex cases, revision surgeries, or when the canaliculi (the tiny channels leading into the lacrimal sac) are also compromised. Reviewed studies generally show success rates of 80% to 95% when silicone tubes are used, and they appear most beneficial in complicated scenarios rather than straightforward first-time DCR.24PubMed Central. Success Rate of External Dacryocystorhinostomy With and Without Stent
Mitomycin C, a drug that inhibits scar tissue formation, has been tried as a surgical adjunct with mixed results. A randomized trial comparing silicone stenting, mitomycin C application, and conventional technique in endonasal DCR found that stenting significantly improved success rates, while mitomycin C did not provide a clear advantage over the conventional method.25PubMed Central. Comparison of Application of Mitomycin C Vs Silicon Stenting Vs Conventional Method in Endonasal Dacrocystorhinostomy: A Randomized Controlled Trial of 150 Patients Another study specifically examining mitomycin C in cases with poor-quality surgical flaps also found no proven benefit.26PubMed. Effect of mitomycin C on success rate in dacryocystorhinostomy with silicone tube intubation and improper flaps The evidence, in short, is lukewarm for mitomycin C in this context, and many surgeons skip it.
Dacryocystitis in Babies
Congenital nasolacrimal duct obstruction affects a sizable minority of newborns. The telltale sign is a watery or goopy eye, usually starting within the first few weeks of life, sometimes with a swollen bump near the nose if genuine dacryocystitis develops. The encouraging news is that many of these blockages resolve on their own within the first year as the membrane at the bottom of the duct opens spontaneously. Parents are usually instructed to do gentle lacrimal sac massage (pressing downward along the side of the nose) and keep the area clean.
When conservative measures fail, the standard next step is probing, a brief procedure where a thin, blunt probe is passed through the duct to physically open the obstruction. Timing matters. A large retrospective study found that probing within the first 12 months of life achieved a short-term success rate above 97%, while waiting until after 12 months dropped success to about 87%.27PubMed Central. Optimal timing of lacrimal duct probing for congenital nasolacrimal duct obstruction in infants: A retrospective cohort study Another study confirmed the general pattern: success rates fell with increasing age, and membranous obstructions responded better than firm ones.28PubMed Central. Success rate of probing for congenital nasolacrimal duct obstruction at various ages
The microbiology in children differs somewhat from adults. In pediatric chronic dacryocystitis, Streptococcus pneumoniae tends to be the leading isolate, while in pediatric acute dacryocystitis, Staphylococcus aureus dominates, showing up in roughly 42% of culture-positive cases.29PubMed Central. The microbiologic spectrum of dacryocystitis Current thinking suggests probing somewhere between 7 and 9 months is a reasonable strategy for children without recurrent infections, with earlier intervention considered for those who develop complications.30PubMed Central. Success rates of probing for congenital nasolacrimal duct obstruction at various ages
Can a Lacrimal Sac Mass Mimic Dacryocystitis
Here is something that does not get mentioned often enough: a tumor of the lacrimal sac can present with symptoms that look a lot like chronic dacryocystitis. Persistent tearing, a mass near the medial canthus, maybe some discharge. In a single-institution review, the average time from symptom onset to tumor diagnosis was nearly 15 months, and the most common presentation was a lacrimal sac mass.31PubMed Central. Lacrimal Sac Tumors: A Single-institution Experience, Including New Insights The overwhelming majority of these tumors turned out to be malignant. Lacrimal sac tumors are rare, but the overlap in symptoms means clinicians should maintain a healthy suspicion, particularly when a supposed dacryocystitis does not respond to typical treatment or recurs after apparently successful surgery.
Dacryocystitis in Animals
If you have a pet rabbit with a weepy, crusty eye, dacryocystitis is on the short list of likely causes. Rabbits are particularly prone because their nasolacrimal duct follows a tortuous path close to the roots of the upper teeth, and dental malocclusion, extremely common in domestic rabbits, can compress or irritate the duct. In one retrospective study, about half of affected rabbits had dental disease, and treatment typically involved flushing the duct plus topical antibiotics over a mean course of nearly six weeks.32PubMed. Clinical presentation, treatment, and outcome of dacryocystitis in rabbits: a retrospective study of 28 cases (2003-2007) Certain breeds, including Lionhead crosses and Dwarf Lop crosses, appear to be at higher risk, possibly due to skull shape and the compressed anatomy that comes with it.33PubMed. Retrospective study identifying risk factors for dacryocystitis in pet rabbits
Dogs get dacryocystitis too, though for different reasons. The most common trigger in dogs appears to be a foreign body, often plant material, that works its way into the lacrimal sac. A review of 48 dogs treated with a transconjunctival surgical approach found that a foreign body was discovered in 85% of cases, and after removal and catheter placement, the duct was patent in about 87% at follow-up. Golden retrievers and dachshunds were the most commonly affected breeds.34PubMed. A transconjunctival surgical technique for dacryocystotomy in dogs with foreign body-induced dacryocystitis The lesson for pet owners: a persistently weepy or swollen eye near the nose deserves a veterinary visit, not just a wipe with a damp cloth.