If you have pink eye, the white part of your eye turns pink or red, and you’ll likely notice discharge, tearing, or itching that develops over a few hours to a day. Most cases clear up on their own within one to two weeks, but what you experience and how long it lasts depends on whether a virus, bacteria, or allergen is behind it.
What’s Happening Inside Your Eye
The conjunctiva is a thin, clear membrane that covers the white of your eye and lines the inside of your eyelids. When a virus, bacteria, or allergen irritates this membrane, the tiny blood vessels inside it dilate and fill with blood. That’s what creates the signature pink or red appearance.
With allergic pink eye, the process is driven by histamine. When an allergen like pollen lands on your eye, immune cells in the conjunctiva release a flood of inflammatory chemicals within minutes. Lid swelling typically peaks within 15 to 30 minutes of exposure and fades slowly. The redness tends to look superficial and pink rather than a deep, angry red. With viral and bacterial infections, the inflammation is triggered by the pathogen itself multiplying on the eye’s surface, which recruits immune cells and produces the discharge your body uses to flush the infection out.
The Three Types Feel Different
Viral Pink Eye
This is the most common form and usually starts in one eye before spreading to the other within a day or two. You’ll notice watery, clear discharge rather than anything thick or colored. Your eyes will feel gritty and irritated, and you may have a mild sensitivity to light. It often shows up alongside or just after a cold or upper respiratory infection. Viral pink eye clears up in 7 to 14 days without treatment, though some cases take 2 to 3 weeks or longer.
Bacterial Pink Eye
Bacterial pink eye produces thicker discharge that’s yellow, green, or white. You may wake up with your eyelids crusted shut because the discharge dries overnight. It typically affects one eye but can spread to both. Without treatment, it usually improves in 2 to 5 days, though full resolution can take up to 2 weeks. In rare, severe cases, symptoms escalate quickly with significant swelling, pain, and reduced vision. That pattern needs prompt medical attention.
Allergic Pink Eye
If allergies are the cause, intense itching is the hallmark symptom. Both eyes are almost always affected at the same time, and you’ll likely have other allergy symptoms like sneezing or a runny nose. The discharge is usually watery and clear. Allergic pink eye isn’t an infection, so it’s not contagious, and it improves once you’re no longer exposed to the allergen triggering it.
How It Spreads
Viral and bacterial pink eye are both highly contagious. The infection spreads through direct contact with discharge from an infected eye or through touching contaminated surfaces and then touching your own eyes. Sharing towels, pillowcases, or makeup is a common route.
The pathogens can survive on household surfaces longer than most people expect. Bacteria generally last 2 to 8 hours on surfaces, though some strains persist for 2 days or more. Viruses are hardier, surviving 24 to 48 hours on most surfaces, and some can remain viable for up to 8 weeks. Cleaning with bleach or another antimicrobial cleaner destroys both bacteria and viruses immediately, so wiping down doorknobs, light switches, and bathroom surfaces matters during an active infection.
To reduce the risk of spreading it, wash your hands frequently, avoid touching your eyes, and don’t share personal items like towels or eye drops. Replace or disinfect contact lens cases, and throw away any eye makeup you used while symptomatic.
What Treatment Looks Like
Most pink eye doesn’t require prescription medication. Viral pink eye has no antiviral treatment for the common strains; you manage the discomfort while your immune system handles the infection. Cool compresses on closed eyes and artificial tears can ease the irritation. Allergic pink eye responds well to removing the allergen and using over-the-counter antihistamine eye drops to control the itching.
Bacterial pink eye sometimes warrants antibiotic eye drops, particularly if symptoms are worsening after a few days or if the discharge is heavy. Antibiotics can shorten the duration and reduce how contagious you are. Your doctor will make the call based on how your eye looks and whether you’re at higher risk for complications, such as if you wear contact lenses.
Going Back to School or Work
The CDC advises staying home if you have viral or bacterial pink eye with systemic symptoms like fever, or if you can’t avoid close contact with others. Most schools and workplaces follow similar guidelines, though specific policies vary. You can generally return once any prescribed treatment has been started and a clinician gives approval, or once your symptoms have noticeably improved and discharge has stopped.
Allergic pink eye doesn’t require staying home, since it poses no risk to anyone around you.
Symptoms That Need Prompt Attention
Most pink eye is a nuisance, not a danger. But certain symptoms signal something more serious is going on. If you notice significant eye pain (not just irritation), a noticeable change in your vision, intense sensitivity to light, or symptoms that keep getting worse after several days instead of improving, these can indicate a deeper infection or a different eye condition entirely. Contact lens wearers should be especially cautious, since infections can progress more quickly when a lens is involved.