Pink eye or allergies: how to tell the difference
Last updated September 4, 2026.
A red, weepy eye is either an infection or an allergy, and the itch tells you which. Intense itch in both eyes with sneezing points to allergies. Gritty, watery, one eye then the other points to viral pink eye. Thick yellow-green discharge that glues the lids shut points to bacterial. Each is handled differently, and only one needs antibiotic drops.
How do I tell pink eye from allergies?
- Allergies: intense itch, both eyes, watery or stringy discharge, plus sneezing or a known pollen season. Not contagious.
- Viral pink eye: gritty feeling more than itch, watery, starts in one eye and often jumps to the other, often with a cold. Contagious.
- Bacterial pink eye: thick yellow or green discharge, lids glued shut in the morning. Contagious.
One more tell: allergies come back every season or every exposure. An infection is a one-off episode.
Do I need antibiotic eye drops?
Only the bacterial kind responds to antibiotic drops, and even mild bacterial cases often clear on their own in about a week. Viral pink eye does not respond to antibiotics and clears in one to two weeks with a cool compress and artificial tears for comfort. Allergic eyes respond to antihistamine eye drops, many over the counter, plus not rubbing, since rubbing makes the itch worse. Contact lenses stay out until the eye is fully back to normal, whichever type you have.
Can my child go to school with pink eye?
Often yes. The CDC notes that most children with pink eye do not need to stay home unless they have a fever or are too unwell to take part, though schools and daycares set their own policies, so check yours. The habits that limit spread are simple: hands washed often and eyes left alone.
When is a red eye urgent?
Same-day care for eye pain rather than surface irritation, real light sensitivity, blurred vision that does not clear when you blink, a red eye in a contact lens wearer, an injury, a red eye in a newborn, or symptoms with a weakened immune system. Chemical in the eye skips everything else: rinse with clean water for 15 minutes first, then get seen.
What a Pymander AI doctor consult looks like
Illustrative example, not a real member's messages.
Common questions
How do I tell pink eye from allergies?
The itch and the discharge separate them. Allergies cause intense itching in BOTH eyes with watery or thin stringy discharge, usually alongside sneezing, a runny nose, or a known pollen season. Viral pink eye feels gritty more than itchy, starts in one eye and often jumps to the other, runs watery, and frequently arrives with a cold. Bacterial pink eye produces thick yellow or green discharge that glues the lids shut overnight. One more tell: allergies come back every season or every exposure, while an infection is a one-off episode.
Is pink eye contagious?
Viral and bacterial pink eye are both contagious and spread through hand-to-eye contact, shared towels, pillowcases, and eye makeup. Wash hands often, do not touch your eyes, and keep towels and pillows to yourself until the discharge stops. Allergic conjunctivitis is not contagious at all, no matter how red the eyes look. Throw away eye makeup you used just before or during the infection, since it can reseed it.
Do I need antibiotic eye drops?
Only bacterial pink eye responds to antibiotic drops, and even then mild cases often clear on their own in about a week. Viral pink eye does not respond to antibiotics at all and clears in one to two weeks; a cool compress and artificial tears keep you comfortable while it runs its course. Allergic eyes respond to antihistamine or mast-cell stabilizer eye drops, many of them over the counter, plus avoiding the trigger and not rubbing, since rubbing makes the itch cascade worse. If you wear contact lenses, stop wearing them until the eye is fully back to normal.
Can my child go to school with pink eye?
Often yes. The CDC notes that most children with pink eye do not need to stay home unless they have a fever or are too unwell to take part in the day, though many schools and daycares set their own policies, so check yours. Whichever way it goes, teach the two habits that actually limit spread: hands washed often and eyes left alone. A child whose eyes are glued shut each morning with thick discharge is the one most likely to be sent home and the one most worth having seen.
When is a red eye urgent?
Same-day care for eye pain rather than surface irritation, real sensitivity to light, blurred vision that does not clear when you blink, a red eye in a contact lens wearer, an injury or chemical splash, a red eye in a newborn, or symptoms in someone with a weakened immune system. Those patterns raise possibilities that are not simple pink eye, like a corneal ulcer or inflammation inside the eye, and they do not wait. Chemical in the eye is the one exception that skips everything else: rinse with clean water for 15 minutes first, then get seen.
Can telehealth diagnose pink eye?
Usually yes. The combination of your symptom story and a clear photo or video of the eye is enough to sort viral from bacterial from allergic in most cases, and a clinician can send antibiotic drops to your pharmacy when the bacterial pattern fits. Texting an AI doctor first is a fast way to find out which of the three you are dealing with and whether anything about it needs same-day in-person care.