Most cases of conjunctivitis (pink eye) clear up on their own within one to two weeks, though the exact timeline depends on whether the cause is viral, bacterial, or allergic. Viral pink eye, the most common type, can linger for two to four weeks in some cases. Bacterial pink eye typically resolves in one to two weeks even without antibiotics. Allergic conjunctivitis can disappear within hours or persist for weeks, depending on your exposure to the trigger.
Viral Pink Eye: The Slowest to Clear
Viral conjunctivitis is the most common form and, unfortunately, the one that takes the longest to resolve. The infection typically clears on its own within two to four weeks. There’s no antibiotic or antiviral that speeds up a standard case. You’re essentially waiting for your immune system to fight off the virus, similar to a common cold.
Symptoms can appear anywhere from 12 hours to 12 days after exposure. You remain contagious for roughly 10 to 12 days from the onset of symptoms, as long as your eyes are still red and watery. In rare cases, symptoms persist for two to three weeks. A particularly aggressive strain called epidemic keratoconjunctivitis can cause severe inflammation of both the conjunctiva and cornea, and it carries a risk of vision loss, so persistent or worsening symptoms deserve medical attention.
Bacterial Pink Eye: Faster, With or Without Drops
Bacterial conjunctivitis usually resolves in about one to two weeks without any treatment. That timeline surprises many people, because antibiotic eye drops are so commonly prescribed for pink eye. The American Academy of Ophthalmology notes that antibiotics usually don’t help pink eye go away faster. Doctors typically reserve antibiotic prescriptions for cases that aren’t improving after two to three weeks, or for people at higher risk of complications.
One group that does benefit from prompt antibiotic treatment: contact lens wearers. Bacterial conjunctivitis in contact lens users raises the risk of a more serious corneal infection called bacterial keratitis. If you wear contacts and develop pink eye, remove your lenses right away and get evaluated.
You stay contagious with bacterial pink eye as long as your eyes are tearing and producing that sticky discharge that mats your eyelids together, especially overnight. Once the discharge stops and your eyes look clear, you’re generally no longer spreading the infection.
Allergic Conjunctivitis: Hours to Months
Allergic conjunctivitis behaves differently from the infectious types because it isn’t caused by a virus or bacterium. Your immune system is reacting to pollen, pet dander, dust mites, or another allergen. The timeline depends entirely on whether you can get away from the trigger.
If you can remove the allergen, relief comes fast. Oral antihistamines start working in about 30 minutes, and allergy eye drops kick in within roughly an hour. But if you’re dealing with seasonal allergies or can’t avoid the trigger, symptoms can persist for days, weeks, or even months. Allergy immunotherapy (allergy shots) may take several weeks to begin working, and full improvement can take six months or longer.
Pink Eye in Newborns
Conjunctivitis in newborns is a separate situation with different timelines and higher stakes. The most benign form, chemical conjunctivitis caused by antibiotic eye drops given at birth, clears up in 24 to 36 hours on its own.
Infections passed from mother to baby during delivery are more serious. Chlamydial conjunctivitis can spread to a newborn’s lungs and airway. Gonococcal conjunctivitis, if untreated, can lead to corneal ulcers, blindness, bloodstream infections, or meningitis. Herpes virus infections of the eye can also cause severe damage. Any signs of pink eye in a newborn need immediate medical evaluation rather than watchful waiting.
When You Can Return to Work or School
There’s no universal rule that requires you to stay home with pink eye, but the CDC recommends avoiding work or school if your activities involve close contact with others and you still have active symptoms. Tearing, discharge, and redness are the signs that you’re still contagious. If you no longer have a fever or other symptoms, you may be able to return with your doctor’s approval.
In practical terms, most people with viral pink eye are contagious for 10 to 12 days. With bacterial pink eye, contagiousness drops once the discharge clears. Allergic conjunctivitis isn’t contagious at all, so there’s no medical reason to stay home for it.
Signs Your Pink Eye Needs Medical Attention
Most pink eye is a nuisance, not a danger. But certain symptoms signal something more serious. Significant eye pain (beyond mild irritation), sensitivity to light, blurred vision that doesn’t clear when you blink away discharge, or symptoms that keep getting worse after a week all warrant a visit to a doctor. The same applies if your pink eye hasn’t improved after two to three weeks.
Contact lens wearers should be evaluated early rather than waiting it out. And anyone with a weakened immune system or a history of eye surgery should treat new conjunctivitis symptoms with more urgency, since the risk of complications is higher in those groups.