Conjunctivitis in Toddlers: A Practical Parent's Guide

A toddler with red, sticky, weeping eyes is a routine experience in any family using nursery — these settings are essentially conjunctivitis factories. Most of the time the infection is mild, runs its course in a week or so, and doesn't need much from you beyond patience and cotton wool.

This article is the practical version: which type you're probably dealing with, what to do, what not to bother with, and the small minority of cases that need a doctor.

Healthbooq covers the everyday illnesses that come up in early years and the practical decisions parents face.

The Three Common Types

Viral conjunctivitis is the most common. It usually arrives alongside a cold — runny nose, mild fever, the works. Discharge is watery rather than pus-like; eye is pink rather than bright red. Often starts in one eye and spreads to the other within a day. Highly contagious for as long as the eye is weeping. Self-resolves in 7–14 days.

Bacterial conjunctivitis produces thicker yellow or green pus that crusts the lashes overnight, sometimes gluing the eye shut by morning. Eyelid swelling is common. One or both eyes affected. Caused most often by Staphylococcus aureus, Streptococcus pneumoniae, or Haemophilus influenzae. Most cases resolve within 7–10 days even without treatment; antibiotics shave 1–2 days off recovery and reduce contagiousness.

Allergic conjunctivitis is the seasonal one — itchy, watery, both eyes, often with sneezing and a runny nose. Pollen, pet dander, dust mites are the usual suspects. Not contagious. Treated with antihistamine drops, oral antihistamines, or both.

What to Do at Home

Clean the eye, often.

• Boil water, let it cool to room temperature.
• Soak a fresh piece of cotton wool.
• Wipe gently from the inner corner of the eye outward — one stroke, then a fresh piece.
• One eye at a time, never the same piece for both.
• Wash your hands before and after.

For a child resisting cleaning, do it during a feed, while watching a calm video, or with another adult holding the toddler's hand. A warm-then-cooled wet flannel held against the closed eye for 30 seconds first softens crust and makes wiping much easier.

For viral cases: that's basically the whole job. Lubricant artificial tears (preservative-free, OTC) can soothe gritty discomfort. Cool damp cloths over closed eyes feel nice. No antibiotics — they don't help viral infection.

For bacterial cases: clean as above, plus chloramphenicol drops or ointment.

• Drops: 1 drop every 2 hours while awake for the first 48 hours, then 4 times a day. Continue 48 hours after the eye looks normal.
• Ointment: apply 4 times a day, or just at night with daytime drops. Easier in younger children.
• Available over the counter for children aged 2 and over at any UK pharmacy. Under 2, prescription only — see GP or use NHS Pharmacy First scheme (England) where the pharmacist can assess and supply.

A genuinely mild bacterial conjunctivitis without much discomfort is fine to watch for 2–3 days first. NICE supports this approach. If it isn't improving, start drops.

For allergic cases:

• Cool damp cloths.
• Lubricating drops to flush allergens.
• Sodium cromoglicate (Opticrom) — OTC from age 6 in some products. Mast cell stabiliser, works as prevention.
• Olopatadine, ketotifen — antihistamine drops.
• Oral antihistamine (cetirizine, loratadine, fexofenadine) if hay fever symptoms are also present.

When It's Definitely Time to See a Doctor

A small list, but worth memorising:

• Baby under 28 days with any conjunctivitis — same-day GP or A&E. Could be gonococcal (days 2–5, dramatic) or chlamydial (days 5–14, less acute), both potentially sight-threatening.
• Significant eye pain — not just gritty discomfort.
• Photophobia — child distressed by normal light, holds eye closed, hides face.
• Reduced or blurred vision that doesn't clear once the crust is wiped away.
• Cloudy area on the cornea (the clear front of the eye).
• Hot, very swollen, red eyelid — could be peri-orbital cellulitis, which needs IV antibiotics in hospital.
• Eye looks bulging or movement is abnormal.
• Fever, lethargy, or generally unwell alongside the eye symptoms.
• Recent contact with a herpes cold sore.
• Contact lens wearer (older children) with a red painful eye.
• No improvement after 5 days of correctly used antibiotic drops.
• Symptoms worsening rather than gradually improving.

Most of these point to something more than conjunctivitis — keratitis, iritis, peri-orbital cellulitis, foreign body, herpes. All need specific assessment.

Nursery and School

UK NHS and Public Health Agency guidance no longer requires children with conjunctivitis to be excluded from nursery or school. In practice, most nurseries still apply their own exclusion policy — usually until the discharge has cleared or the child has had 24 hours of antibiotic drops.

Check your nursery's policy. Even when not formally required to keep them home, you may want to: a toddler with weeping eyes is uncomfortable, the chance of passing it on to other family members rises with proximity, and the nursery may bring it back to you next week through another child.

While at home and in nursery during recovery:

• Hand washing for everyone.
• No shared towels, flannels, or pillowcases.
• Wash bedding hot during the active phase.
• Don't share teddies or comfort objects with siblings.

What Doesn't Help

• Breast milk in the eye. No good evidence; risk of contamination.
• Chamomile tea or salt water washes. Not sterile, can sting, no benefit over plain cooled boiled water.
• Antibiotic drops "just in case" for a viral cold-eye. Useless for viruses.
• Steroid drops without specialist instruction. Can worsen herpes infection and raise eye pressure.

Why Toddlers Catch It So Often

A few reasons that conjunctivitis seems to do laps of every nursery:

• Toddlers rub their eyes constantly with hands that have just been on toys, surfaces, and other toddlers.
• Adenovirus — the main viral cause — survives on toys and surfaces for days.
• Hand washing is genuinely poor in this age group, no matter what the nursery says.
• Toddlers cry, snuffle, and hug each other — a perfect transmission setup.

Hand washing at home — your hands, your child's hands, before and after eating, after wiping noses — is the single most effective thing you can do to slow it spreading through your house. It won't stop it entirely. Living with toddlers means living with the occasional pink eye.

Toddlers get conjunctivitis often — viral with colds, bacterial after a few weeks of nursery, allergic in spring. Most cases resolve in 1–2 weeks regardless of treatment. Cleaning with cooled boiled water on cotton wool is the foundation; chloramphenicol drops (OTC age 2+) speed bacterial cases by a day or two. Skip nursery while the eye is actively discharging — even though formal NHS guidance no longer requires it, most settings ask for a clear eye before return. Get medical advice for any baby under 28 days, eye pain, vision change, or hot swollen eyelid.