---
title: What is dacryocystitis?
description: "[Dacryocystitis is infection and inflammation of the lacrimal sac,](https://bluefinvision.com/blog/what-is-dacryocystitis/) the reservoir in the inner corner of the eyelids that drains tears into the nose. It is often caused by obstruction of the nasolacrimal duct. ## Symptoms Patients experience pain, redness,…"
url: "https://bluefinvision.com/knowledge-base/topics/conditions-diseases/what-is-dacryocystitis/"
updated: "2026-01-22"
category: "Conditions & Diseases"
---

# What is dacryocystitis?

[Dacryocystitis is infection and inflammation of the lacrimal sac,](https://bluefinvision.com/blog/what-is-dacryocystitis/) the reservoir in the inner corner of the eyelids that drains tears into the nose. It is often caused by obstruction of the nasolacrimal duct.

## Symptoms

Patients experience pain, redness, and swelling at the inner corner of the lower eyelid, sometimes with discharge or a tender lump. Tearing (epiphora) is common.

- Acute episodes may be accompanied by fever and malaise
- Chronic dacryocystitis can cause persistent discharge and watering
- Pressure over the sac may express pus through the punctum

## Treatment

Acute infection is treated with systemic antibiotics and careful monitoring. Definitive management usually requires surgery to bypass the blockage, such as external or endoscopic dacryocystorhinostomy.

## Complications

Untreated dacryocystitis can lead to abscess formation or, rarely, spread of infection to surrounding tissues, so timely treatment is important.