Dacryocystitis: Causes, Clinical Features, Diagnosis, and Management

 


Introduction

Dacryocystitis is an inflammatory condition resulting from infection of the lacrimal sac, a key structure in the tear drainage system of the eye. The condition typically develops due to obstruction of the nasolacrimal duct, which leads to stagnation of tears and subsequent bacterial proliferation. Although dacryocystitis may initially appear as localized swelling near the eye, delayed or improper treatment can result in serious complications, including abscess formation, orbital cellulitis, and systemic infection. Early diagnosis and appropriate intervention are therefore crucial.

Anatomy and Pathophysiology

The lacrimal drainage system consists of the puncta, canaliculi, lacrimal sac, and nasolacrimal duct. Tears normally drain from the ocular surface into the nasal cavity through this pathway. When the nasolacrimal duct becomes blocked, tears accumulate in the lacrimal sac, creating an ideal environment for microbial growth.

Dacryocystitis occurs when this stagnant tear reservoir becomes infected. The obstruction may be congenital, acquired, or secondary to nasal pathology. The resulting inflammation causes swelling, pain, and discharge at the medial canthus of the eye.






Causes and Risk Factors

The most common underlying cause of dacryocystitis is nasolacrimal duct obstruction. In infants, this obstruction is usually congenital, while in adults it is often acquired.

Common causes include:

  • Congenital narrowing or incomplete canalization of the nasolacrimal duct

  • Age-related degenerative changes

  • Chronic nasal or sinus infections

  • Facial trauma affecting the nasal bones

  • Nasal polyps or tumors

Several risk factors increase susceptibility:

  • Advanced age

  • Female gender, due to anatomically narrower ducts

  • Chronic sinus disease

  • Poor eyelid or nasal hygiene

The most frequently implicated organisms include Staphylococcus aureus, Streptococcus species, and Gram-negative bacteria.




Clinical Features

Dacryocystitis may present as either acute or chronic, each with distinct clinical characteristics.

Acute Dacryocystitis

  • Painful, red swelling at the inner corner of the eye

  • Marked tenderness over the lacrimal sac

  • Excessive tearing (epiphora)

  • Purulent discharge expressed on pressure

  • Fever and malaise in severe cases

Chronic Dacryocystitis

  • Persistent watering of the eye

  • Recurrent mucous or mucopurulent discharge

  • Minimal pain or redness

  • Recurrent conjunctivitis

Acute episodes may develop on a background of chronic disease if left untreated.




Diagnosis

Diagnosis is primarily clinical and based on history and physical examination. Gentle pressure over the lacrimal sac may cause regurgitation of purulent material through the punctum, a classic diagnostic sign.

Additional investigations may include:

  • Lacrimal irrigation to assess patency

  • Microbiological culture of discharge

  • Imaging studies such as CT scan in complicated or recurrent cases

Routine imaging is not required unless orbital involvement or an atypical cause is suspected.

Management

Treatment aims to control infection and correct the underlying obstruction.

Medical Treatment

Acute dacryocystitis requires:

  • Systemic antibiotics, as topical therapy alone is ineffective

  • Warm compresses to relieve pain and inflammation

  • Analgesics for symptomatic relief

Massage of the lacrimal sac is generally avoided during acute infection to prevent spread.

Surgical Treatment

Definitive management involves restoring tear drainage. The most effective procedure is dacryocystorhinostomy (DCR), which creates a new passage between the lacrimal sac and the nasal cavity. This may be performed using external or endoscopic techniques.

In cases of abscess formation, incision and drainage may be required before definitive surgery.





Complications

Untreated dacryocystitis can lead to:

  • Lacrimal sac abscess

  • Preseptal or orbital cellulitis

  • Cutaneous fistula formation

  • Rarely, intracranial spread of infection

These complications underscore the importance of early and appropriate treatment.

Conclusion

Dacryocystitis is a potentially serious infection of the lacrimal drainage system, most often caused by nasolacrimal duct obstruction. While medical therapy controls acute infection, surgical intervention is essential for long-term resolution. Early diagnosis, prompt treatment, and correction of the underlying cause are key to preventing complications and preserving ocular health.

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