Pink eye, or conjunctivitis, shows up as a pink or red tint in the white of your child’s eye, often paired with some form of discharge and crustiness around the eyelids. It’s one of the most common eye problems in children, and in most cases you can spot it at home before deciding whether a doctor visit is needed. The type of discharge your child has is the single best clue to figuring out what’s causing it.
The Core Signs to Look For
Pink eye can affect one or both eyes, and the symptoms tend to overlap regardless of the cause. The telltale signs include:
- Pink or red coloring in the white of the eye, caused by inflamed blood vessels
- Discharge that may be clear, white, yellow, or green
- Crusting on the eyelids or lashes, especially after sleep
- Swollen eyelids that look puffy or feel tender
- Watery, teary eyes beyond normal tearing
- Irritation or burning, or your child saying it feels like something is stuck in the eye
- Frequent rubbing, particularly in younger kids who can’t describe the sensation
In toddlers and babies who can’t tell you what they feel, watch for excessive eye rubbing, fussiness, and visible redness or goop in the corners of the eyes. Morning crustiness that makes it hard to open the eyes is one of the most recognizable signs parents notice first.
How to Tell the Type by the Discharge
The character of your child’s eye discharge is the most useful way to narrow down whether the cause is bacterial, viral, or allergic. Each type looks and behaves differently.
Bacterial Pink Eye
Bacterial conjunctivitis is the most common type in children. The hallmark is thick, pus-like discharge that’s usually yellow or green. This is the type that causes eyelids to be matted shut in the morning, sometimes so firmly that your child needs help opening them. It can start in one eye and spread to the other within a day or two. Because bacteria are the leading cause of pink eye in kids (more so than in adults), thick discharge in a child’s eye is a strong signal that antibiotics may be needed.
Viral Pink Eye
Viral pink eye produces watery, thin discharge rather than thick pus. Children often describe a burning or gritty feeling, like sand in the eye. You may also notice some crusting on the lid margins in the morning, but the eyelids won’t be glued shut the way they are with bacterial infections. Viral conjunctivitis sometimes shows up alongside a cold, sore throat, or fever, especially when caused by adenovirus. If your child has a runny nose and red, watery eyes at the same time, a virus is the likely culprit.
Allergic Pink Eye
The biggest giveaway with allergic conjunctivitis is intense itching. It almost always affects both eyes at once and tends to be seasonal, flaring during pollen-heavy months. The discharge is watery and clear. Your child may also have other allergy symptoms like sneezing or a stuffy nose. Unlike infectious pink eye, the allergic type isn’t contagious at all.
How Long It Lasts and Stays Contagious
Both bacterial and viral pink eye are contagious, spreading through direct contact with eye discharge or contaminated hands and surfaces. Your child generally remains contagious as long as their eyes are still tearing and matted. Depending on the cause, symptoms typically improve within a few days to two weeks.
Bacterial pink eye often clears faster with antibiotic drops, sometimes improving within 24 to 48 hours of starting treatment. Viral pink eye has no antibiotic fix and simply has to run its course, usually resolving on its own within one to two weeks. Many schools and daycares require children to stay home while symptoms are active, so check your child’s policy. A good rule of thumb: once the discharge and redness have cleared, contagion risk drops significantly.
Comfort Measures at Home
While you’re managing pink eye at home, a few simple steps can help your child feel better. A cold compress (a clean, damp washcloth held gently over the closed eye) soothes swelling and irritation. Artificial tears, available over the counter, can relieve dryness and flush out some of the discharge. Use a fresh, warm washcloth to gently wipe away crust from the eyelids, especially in the morning. Always wipe from the inner corner outward, and use a separate cloth for each eye to avoid spreading the infection.
For allergic pink eye specifically, over-the-counter antihistamine eye drops or oral allergy medications can provide noticeable relief. Keep your child’s hands clean and discourage eye rubbing, which worsens irritation and spreads infectious types to others. Wash pillowcases, towels, and washcloths frequently, and don’t let siblings share them.
Signs That Need Prompt Medical Attention
Most pink eye in children is uncomfortable but not dangerous. However, certain symptoms point to something more serious than standard conjunctivitis. Get your child seen quickly if they have:
- Eye pain beyond mild irritation
- Blurred vision or trouble seeing clearly
- Sensitivity to light that makes them squint or avoid bright rooms
- A feeling that something is stuck in the eye that doesn’t improve
- Symptoms that worsen after several days instead of improving
These can signal conditions beyond pink eye, including corneal infections or inflammation deeper inside the eye, that need treatment to protect your child’s vision.
Pink Eye in Newborns Is Different
Pink eye in a newborn (under 28 days old) is a separate situation that always warrants immediate medical evaluation. Newborns can develop conjunctivitis from bacteria passed during delivery, and some of these infections progress rapidly.
Gonococcal conjunctivitis appears within the first two to five days of life and causes severe redness, thick pus, and swollen eyelids. Without treatment, it can spread to the bloodstream or the lining of the brain and spinal cord. Chlamydial conjunctivitis typically shows up five to 12 days after birth with redness and watery discharge that can progress to pus. Herpes virus can also cause newborn eye infections with the potential for serious damage. If your newborn develops any eye redness, discharge, or puffy eyelids, contact your pediatrician right away rather than waiting to see how it develops.
Bacterial Pink Eye Often Needs a Doctor Visit
Since bacterial conjunctivitis makes up the majority of pink eye cases in children, many kids will benefit from antibiotic eye drops or ointment. If your child has thick yellow or green discharge, eyelids stuck together in the morning, and the problem is getting worse rather than better, a visit to the pediatrician is worthwhile. The doctor can usually diagnose pink eye based on appearance alone, without any special tests.
Viral and allergic pink eye don’t require antibiotics. Viral cases resolve on their own, and allergic cases respond to allergy treatments. If you’re unsure which type your child has, the discharge is your best guide: thick and colored means likely bacterial, watery and clear means likely viral or allergic, and intense itching in both eyes with seasonal timing points to allergies.