Pink eye is one of the most common eye complaints — and one of the most misunderstood. Not all pink eye is contagious, not all of it needs antibiotics, and figuring out which type you have changes everything about how it's treated.

What Is Pink Eye?

Conjunctivitis is inflammation of the conjunctiva — the clear membrane covering the white of your eye and the inside of your eyelids. It causes the redness, irritation, and discharge most people associate with "pink eye."

The Three Main Types

• Viral conjunctivitis — the most common type, often accompanying a cold. Highly contagious, with watery discharge, and typically resolves on its own over 1-2 weeks.
• Bacterial conjunctivitis — causes thicker, yellow or green discharge, often with eyelids crusted shut in the morning. Also contagious, and usually treated with antibiotic drops.
• Allergic conjunctivitis — not contagious at all, triggered by pollen, pet dander, or other allergens, and typically affects both eyes with intense itching.

How to Tell Them Apart

• Itchy, both eyes, seasonal pattern → likely allergic
• Watery, started with a cold, one eye then spreading to both → likely viral
• Thick discharge, crusty eyelids, one eye first → likely bacterial

Treatment Differs by Type

Viral conjunctivitis generally just needs time, cool compresses, and artificial tears — antibiotics won't help since they don't treat viruses. Bacterial conjunctivitis typically responds well to prescription antibiotic drops. Allergic conjunctivitis is managed with antihistamine drops and avoiding triggers when possible.

When to See a Doctor

While mild pink eye often resolves on its own, see a doctor if you experience significant pain, light sensitivity, vision changes, symptoms lasting more than a week or two, or if you wear contact lenses (which raises the risk of a more serious infection).

Preventing Spread

Viral and bacterial conjunctivitis spread easily through touching your eyes and then touching other surfaces. Frequent hand washing, avoiding shared towels or pillowcases, and not touching your eyes can help limit spread to others.

The Bottom Line

"Pink eye" isn't one condition — it's three, and each needs a different approach. If you're not sure which type you're dealing with, that's exactly the kind of question worth a quick visit to settle.

Dealing with a red, irritated eye? Schedule an appointment with our team.