Types of conjunctivitis: how allergic, infectious and dry eye differ
Different types need very different care. Mixing them up can delay recovery.
Main differences
- Allergic: mainly itchy eyes, usually in both eyes, discharge is often stringy and sticky, often with nose symptoms, and tends to come back
- Infectious: often starts in one eye, discharge is yellow-green and pus-like, and there may be clear pain and eyelid swelling
- Dry eye related: mainly dryness, a feeling of something in the eye, burning and eye strain, which gets worse after using the eyes for a long time
Why it matters to tell them apart
The three types are handled differently. Infectious conjunctivitis needs treatment aimed at the cause. Allergic conjunctivitis is mainly managed by controlling the allergy and easing symptoms. Dry eye focuses more on eye-use habits and lubrication. Using antibacterial eye drops on your own is not only ineffective, it may also cause side effects.
See a doctor if you cannot tell
If you have eye pain, reduced vision, worsening light sensitivity, pus-like discharge, or symptoms that do not get better, see an eye doctor as soon as possible. The doctor can confirm the type using tests such as a slit lamp exam. Writing down the features of your symptoms and when they started can help with the assessment.
This article is for general information only and is not medical advice. Please follow your doctor's instructions.
This article is for general information only and is not medical advice. If your symptoms affect daily life, please see a doctor.