Pink eye in kids typically shows up as noticeable redness across the white of one or both eyes, along with some type of discharge and puffy eyelids. But the exact look varies depending on whether the cause is viral, bacterial, or allergic, and those differences matter because they point to different approaches for handling it.
The Redness Itself
The hallmark is a pink-to-red color spreading across the white part of the eye. It can range from a faint pinkish tint to a vivid, bloodshot red. In younger kids who can’t explain what they’re feeling, you’ll often notice them rubbing their eyes frequently. Older children might tell you it feels like sand is stuck in their eye.
Pink eye often starts in one eye and spreads to the other within a few days, especially with viral infections. So if your child wakes up with one red, goopy eye and the second eye looks the same a day or two later, that progression is typical.
Viral Pink Eye
Viral conjunctivitis is the most common type in kids and produces a watery, thin discharge rather than thick goop. The eye looks red and irritated, and tears may run more than usual, but the discharge stays clear or slightly whitish. You won’t see the heavy crusting that glues eyelids shut overnight.
Because it’s caused by the same family of viruses behind colds, your child may also have a runny nose, cough, or low fever alongside the eye symptoms. If your kid has a cold and then develops a red, watery eye, viral pink eye is the likely culprit. It’s highly contagious and spreads through coughing, sneezing, or touching the drainage from an infected eye.
Bacterial Pink Eye
Bacterial conjunctivitis looks different in one key way: the discharge. Instead of thin and watery, it’s thick, sticky pus that’s usually yellow or green. This is the type that causes kids to wake up with their eyelids literally stuck together from dried discharge that accumulated overnight. You may need to gently wipe the lids with a warm, damp washcloth before your child can open their eyes.
The redness tends to be more intense than with viral pink eye, and the eye may look swollen. Bacterial pink eye can affect one or both eyes and often produces enough discharge that it collects along the lash line throughout the day, not just overnight.
Allergic Pink Eye
Allergic conjunctivitis almost always affects both eyes at the same time, which is one way to distinguish it early. The discharge is watery (similar to viral), and the eyes look red and puffy. The biggest giveaway is intense itching. Your child will rub their eyes constantly, and you may notice the clear membrane over the white of the eye looking swollen or slightly jelly-like, a sign called chemosis.
Allergic pink eye tends to show up seasonally or after exposure to a known trigger like pet dander or dust. Your child may also be sneezing or have a stuffy nose. You’ll often see light crusting on the eyelid margins in the morning, but nothing like the thick glue of bacterial pink eye.
How to Tell the Types Apart
- Thick yellow or green pus, eyelids stuck shut: most likely bacterial
- Watery discharge, cold symptoms, started in one eye: most likely viral
- Both eyes itchy, watery, seasonal pattern: most likely allergic
These patterns overlap, and even doctors sometimes find it hard to tell viral from bacterial based on appearance alone. But the discharge is the most reliable visual clue for parents trying to figure out what they’re looking at.
What It Looks Like in Newborns
Pink eye in babies under a month old is a different situation entirely. Newborns can develop red, puffy eyelids with pus-like drainage within the first few days to several weeks after birth. The causes range from a blocked tear duct to infections passed from the mother during delivery.
The most serious forms appear early. An infection from gonorrhea typically shows up within the first 2 to 5 days of life and causes thick pus, red eyes, and significant eyelid swelling. Left untreated, it can lead to corneal damage and blindness. Chlamydial infections appear a bit later, usually 5 to 12 days after birth, with similar redness, swelling, and discharge. Because the symptoms of all these causes look nearly identical in a newborn, any eye redness or drainage in a baby under 30 days old needs prompt medical evaluation.
Signs That Point to Something More Serious
Most pink eye in kids is uncomfortable but harmless. A few warning signs, however, suggest something beyond routine conjunctivitis. Periorbital cellulitis, an infection of the skin around the eye, can mimic pink eye at first glance but typically causes swelling of one eyelid that’s warm and tender to touch, with the skin turning red or purplish. The swelling may look more dramatic than what you’d expect from simple pink eye.
If your child complains of pain when moving their eye, has trouble seeing clearly, develops a fever alongside significant eyelid swelling, or if one eye starts to bulge forward, those are red flags for a deeper infection that needs urgent attention. Standard pink eye causes discomfort and irritation but should not cause vision changes or severe pain with eye movement.
What to Expect as It Clears Up
Viral pink eye typically runs its course in 7 to 14 days without treatment, gradually fading on its own. The redness and wateriness may get worse before they get better, peaking around days 3 to 5. Cool compresses and artificial tears can ease discomfort during that stretch.
Bacterial pink eye often improves faster with antibiotic eye drops, though mild cases can also resolve on their own. You’ll know it’s clearing up when the thick discharge starts to thin out, the morning crusting decreases, and the redness fades. Allergic pink eye comes and goes with exposure to the trigger and responds to avoiding the allergen or using allergy-focused eye drops.
During the contagious period for viral and bacterial types, keeping your child’s hands clean and away from their eyes is the single most effective way to prevent it from spreading to siblings or classmates. Separate towels and pillowcases help too.