---
title: Bleb complications and warning signs
description: "Bleb-related complications can occur months or years after trabeculectomy, so recognising warning signs is crucial. Prompt treatment helps protect vision and maintain safe pressure. ## Possible Complications Bleb structure and function can change over time. - Leaky or very thin…"
url: "https://bluefinvision.com/knowledge-base/topics/recovery-aftercare/bleb-complications-and-warning-signs/"
updated: "2025-12-15"
category: "Recovery & Aftercare"
---

# Bleb complications and warning signs

Bleb-related complications can occur months or years after trabeculectomy, so recognising warning signs is crucial. Prompt treatment helps protect vision and maintain safe pressure.

## Possible Complications

Bleb structure and function can change over time.

- Leaky or very thin blebs increase infection risk and may lead to excessively low pressure.
- Encapsulated or scarred blebs can cause pressure to rise again.
- Infection in or around the bleb blebitis or endophthalmitis is a medical emergency.
- Discomfort, foreign‑body sensation, or cosmetic concerns can also develop.

## Warning Signs Needing Urgent Review

Certain symptoms should trigger immediate contact with the eye clinic.

- Sudden pain, redness, or marked sensitivity to light in an eye with a bleb.
- Rapid vision loss, new floaters, or a curtain effect.
- Persistent bleb ooze or overlying conjunctival breakdown.
- Any noticeable change in bleb size, colour, or shape, especially with discomfort.