Dacryocystitis is an inflammation of the nasolacrimal sac, frequently caused by nasolacrimal duct obstruction or infection. The term derives from the Greek dákryon (tear), cysta (sac), and -itis (inflammation). It causes pain, redness, and swelling over the inner aspect of the lower eyelid and epiphora. When nasolacrimal duct obstruction is secondary to a congenital barrier it is referred to as dacrocystoceles. It is most commonly caused by Staphylococcus aureus and Streptococcus pneumoniae. The most common complication is corneal ulceration, frequently in association with S. pneumoniae. The mainstays of treatment are oral antibiotics, warm compresses, and relief of nasolacrimal duct obstruction by dacryocystorhinostomy.
Clinical features 
- Pain, swelling, redness over the lacrimal sac at medial canthus
- Tearing, crusting, fever
- Digital pressure over the lacrimal sac may extrude pus through the punctum
- In chronic cases, tearing may be the only symptom
See also 
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