Pink eye stays contagious for as long as your eyes are still tearing and producing discharge. For most people, that means anywhere from a few days to two weeks depending on whether the infection is bacterial or viral. The practical answer depends on which type you have and whether you’re using treatment.
Viral Pink Eye: The Longest Contagious Window
Viral conjunctivitis, the most common type, is also the most contagious and lasts the longest. Symptoms can appear anywhere from 12 hours to 12 days after exposure, and the infection remains contagious throughout the entire course of illness. Adenovirus, the strain responsible for most cases, can keep you contagious for up to 14 days.
There are no antibiotic drops that shorten a viral case. It has to run its course, much like a common cold. The contagious period ends when your eyes stop watering, the discharge clears up, and any crusting around the eyelids in the morning is gone. For most people that takes one to two weeks, though mild redness can linger a bit longer without necessarily meaning you’re still spreading it.
Bacterial Pink Eye: Faster With Treatment
Bacterial pink eye has a shorter contagious window, especially if you use antibiotic eye drops. You’re contagious from the moment symptoms appear until about 24 to 48 hours after starting antibiotic treatment. Symptoms typically show up 24 to 72 hours after exposure, so the total timeline from infection to being safe around others can be as short as a few days with prompt treatment.
Without antibiotics, though, bacterial pink eye follows the same general rule as viral: you remain contagious as long as your eyes are producing discharge. That can last a week or more. Antibiotics don’t just reduce contagiousness faster, they also tend to clear symptoms sooner and lower the risk of complications, which is why doctors prescribe them for confirmed bacterial cases.
Allergic Pink Eye Is Not Contagious
If your pink eye is caused by allergies, pollen, pet dander, or another irritant, it’s not contagious at all. Allergic conjunctivitis causes redness and watery eyes but involves no virus or bacteria. The key difference: allergic pink eye usually affects both eyes, causes itching more than discharge, and often comes alongside sneezing or a runny nose. You don’t need to isolate or skip work for this type.
How Pink Eye Spreads on Surfaces
Pink eye doesn’t just spread through direct contact. The viruses and bacteria that cause it can survive on surfaces and fabrics for up to two days. Some viruses, particularly adenovirus, can persist on hard surfaces for as long as eight weeks. Bacteria are shorter-lived, typically surviving 2 to 8 hours on most surfaces, though some last up to two days.
This is why reinfection and household spread are so common. Pillowcases, towels, makeup brushes, and contact lens cases are frequent culprits. While you or your child is symptomatic, wash towels and bedding in hot water, don’t share eye cosmetics, and wipe down surfaces like doorknobs and countertops that get touched frequently. Replace contact lens cases and any eye makeup used during the infection.
When You Can Go Back to School or Work
There’s no single rule that applies everywhere. The CDC says you can return to school or work if you have no fever and no active symptoms, with your doctor’s approval. If your job or school involves close contact with others, you should stay home as long as symptoms persist.
Many schools and daycares have their own policies, and some require a note from a doctor. The safest general guideline: stay home until your eyes are no longer producing discharge and the tearing has stopped. For bacterial cases on antibiotics, that 24 to 48 hour window after starting drops is the benchmark most schools accept. For viral cases without treatment, expect to wait closer to a full week or longer.
How to Tell Your Contagious Period Is Over
The clearest physical sign is the absence of discharge. When you wake up without crusty, matted eyelids and your eyes aren’t watering throughout the day, you’re likely past the contagious stage. Redness alone isn’t a reliable indicator since it can persist after the infection has cleared. The key markers are no more tearing, no sticky or colored discharge, and no morning crusting on the lashes. If those are gone, the infection has generally run its course.