---
title: Red eye
description: "Red eye describes when the white part of the eye looks pink or bloodshot. It can be harmless but sometimes signals a more serious problem that needs prompt care. ## Common causes of red eye Redness happens when tiny surface…"
url: "https://bluefinvision.com/knowledge-base/topics/symptoms-signs/red-eye/"
updated: "2025-12-19"
category: "Symptoms & Signs"
---

# Red eye

Red eye describes when the white part of the eye looks pink or bloodshot. It can be harmless but sometimes signals a more serious problem that needs prompt care.

## Common causes of red eye

Redness happens when tiny surface blood vessels swell or leak. This can follow irritation, dryness, allergy, infection, or raised pressure inside the eye.

- Dry eye and blepharitis cause grittiness, burning, and intermittent redness.
- Conjunctivitis often brings discharge and stickiness, sometimes spreading between family members.
- Inflammation inside the eye, such as uveitis, usually causes pain and light sensitivity.
- Acute glaucoma is an emergency with severe pain, blurred vision, halos, and headache.
- Injury or a chemical burn can make the eye very red, sore, and watery.

## When to seek urgent help

Mild redness without pain or vision change often settles with lubricating drops and rest. However, some warning signs mean you should arrange same day assessment.

- Red eye with moderate or severe pain, nausea, or headache.
- Sudden blur, shadow, or strong sensitivity to light.
- History of recent trauma, surgery, or chemical exposure to the eye.
- Redness in a contact lens wearer that does not improve quickly with lens removal.
- Recurrent red eye episodes, especially if linked with joint, skin, or general health problems.