Eye Redness: Causes, Treatments & When to Seek Help
When you notice eye redness, a visible reddening of the eye caused by inflammation, infection or irritation. Also known as red eye, it can be a harmless reaction or a warning sign of a deeper problem.
One of the most common culprits is conjunctivitis, inflammation of the thin membrane covering the white of the eye and the inner eyelids. It often brings itching, a gritty feeling, and a discharge that may be clear, yellow or green. Another frequent trigger is dry eye, insufficient tear production or poor tear quality that leaves the ocular surface vulnerable. When tears can’t lubricate the eye properly, tiny blood vessels dilate, making the eye look bloodshot. Eye redness can also stem from allergic eye reactions, immune‑mediated responses to pollen, pet dander or cosmetics that release histamine in the conjunctiva. Allergy‑related redness usually comes with watery eyes and sneezing. Finally, anyone who wears contacts should watch for contact lens irritation, micro‑abrasions or bacterial buildup on lenses that irritate the eye surface. Even a small amount of debris can trigger dilation of eye blood vessels, creating a vivid red hue.
How to Tell What’s Behind the Redness
First, note any accompanying symptoms. If you have a thick yellow discharge, crusting, or pain when you blink, chances are you’re dealing with bacterial conjunctivitis, which often needs prescription drops. Clear, watery discharge paired with itching points more toward an allergy, and over‑the‑counter antihistamine eye drops can bring quick relief. Dry eye usually feels like a sandpaper sensation; lubricating eye drops or warm compresses can restore comfort. Contact lens wearers should remove lenses immediately, clean them thoroughly, and avoid re‑using them until the eye settles. In every case, consider the environment: wind, smoke, or prolonged screen time can exacerbate any of these conditions.
When in doubt, see an eye‑care professional. Persistent redness lasting more than a few days, pain, vision changes, or a sensation of a foreign body warrants a prompt exam. An ophthalmologist can rule out more serious issues such as uveitis, corneal ulcers or glaucoma, which require urgent treatment. While many red‑eye episodes resolve with simple home care, knowing the difference between a harmless irritation and a sign of infection can save you time, discomfort, and potential complications.
Below you’ll find a curated set of articles that dig deeper into each of these triggers—whether you’re looking for step‑by‑step home remedies, medication comparisons, or guidance on when to call a doctor. Explore the collection to get practical advice tailored to your specific situation, and keep your eyes healthy and clear.
How to Distinguish Allergy‑Induced vs Infection‑Related Eye Redness
Posted By Kieran Beauchamp On 7 Oct 2025 Comments (3)
Learn how to differentiate allergy‑induced eye redness from infection, spot key symptoms, use the right drops, and know when to see a doctor.
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