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You know that moment when your child wakes up with a patch on their face that looks a bit sore, a bit sticky, and somehow worse than it did at bedtime? Impetigo is one of the usual suspects. It’s common, it’s highly contagious, and it has a knack for doing the rounds in nurseries and early primary classes.
The reassuring bit is that most cases clear up quickly with the right treatment and a few boring-but-effective hygiene steps. The tricky bit is knowing what you’re looking at, what treatment is likely, and when your child can go back to school without passing it on.
Impetigo is a bacterial skin infection. It’s usually caused by Staphylococcus aureus, sometimes by group A streptococcus (Streptococcus pyogenes), and occasionally a mix of both. It’s more common in young children, mainly because they’re in close contact with other kids, they touch everything, and they’re not exactly famous for leaving a scab alone.
Impetigo often starts where the skin is already irritated or broken. Think: a runny nose that’s been wiped 300 times, eczema patches, insect bites, scratches, or a grazed knee. The bacteria takes the opportunity and sets up shop.
One reason impetigo spreads so easily is the delay between catching it and seeing it. The incubation period is usually 4 to 10 days. So by the time the first child in the class has obvious sores, other kids may already have been exposed.
Impetigo doesn’t always look identical in every child, but there are a couple of classic patterns.
This often starts as small spots or tiny blisters that burst quickly. After that, you’ll usually see red, sore patches that ooze and then form crusts. The “honey-coloured crust” description is common in medical guidance for a reason. It often appears around the nose and mouth, but it can pop up anywhere.
It can be itchy. It can also make nearby glands (like in the neck) feel a bit swollen or tender.
This type causes larger fluid-filled blisters. It’s more common in babies and younger children. It can look dramatic, even if the child seems otherwise fine.
If you’re unsure whether it’s impetigo, it’s worth getting it checked. Other skin issues can look similar early on, and it’s not something you want to guess with, mainly because of how easily it spreads.
Impetigo spreads through direct contact with the sores, and also through contaminated items. The usual culprits are towels, flannels, bedding, clothing, and sometimes shared toys.
It can also spread around your child’s own body if they scratch and then touch another area. That’s why it sometimes starts as a small patch and then seems to multiply overnight.
If you’ve got more than one child, impetigo can be annoyingly efficient at turning your bathroom into a transmission hub unless you tighten things up for a few days.
Treatment depends on how widespread it is, what type it looks like, and whether your child seems well in themselves.
For lots of families, the first stop is a pharmacist. In England, impetigo is one of the conditions covered by Pharmacy First, which can make it quicker to get assessed and treated without needing a GP appointment.
For a small, localised patch where the child is otherwise well, NICE recommends considering hydrogen peroxide 1% cream. This is a topical antiseptic rather than an antibiotic, and it’s used to reduce antibiotic use where possible.
If hydrogen peroxide cream isn’t suitable, a short course of a topical antibiotic cream may be used.
If it’s spread over a wider area, treatment may be topical antibiotics or oral antibiotics. Practicality matters here. It’s one thing to apply cream to a small patch. It’s another thing entirely when your child has multiple areas and is determined to wrestle you like a slippery eel.
For bullous impetigo, NICE recommends a short course of oral antibiotics. Oral antibiotics are also recommended if the child is systemically unwell, or at higher risk of complications.
One important detail from NICE guidance: you shouldn’t use topical and oral antibiotics together for impetigo. It sounds like the “belt and braces” approach, but it’s not recommended.
With treatment, impetigo often improves within a few days. Without treatment, it can still clear on its own, but it usually takes longer. NICE Clinical Knowledge Summaries describe it as typically self-limiting, with healing over roughly 7 to 21 days without treatment.
So yes, it can go away without medication, but given how contagious it is, treatment is often as much about protecting everyone else as it is about helping the sores clear faster.
This is usually the make-or-break question for parents who have work, childcare, and a life that can’t pause indefinitely.
NHS guidance says impetigo is no longer contagious:
That 48-hour marker is the one most people work to, because it’s clear and predictable.
UK Health Security Agency guidance for schools and childcare settings uses a similar rule, with wording you’ll often see repeated in nursery policies:
Children should be excluded until lesions are crusted and healed, or 48 hours after starting antibiotic treatment.
So in practical terms, most settings will accept a return after 48 hours of treatment, assuming your child is well enough to be there and the sores are drying up rather than actively weeping.
If your child has been treated with hydrogen peroxide cream (rather than antibiotics), you may find some nurseries still quote their policy as “48 hours after antibiotics”. NHS guidance is broader and includes hydrogen peroxide treatment too. If you hit that mismatch, it’s worth having a calm chat with the setting about what they accept, because policies aren’t always updated as quickly as clinical guidance.
If you want a simple mental checklist before sending them back:
If all of that is true, you’re usually in the safe zone.
You don’t need to bleach your entire house and replace all soft furnishings. You do need to be a bit stricter than usual for a few days.
Everyone, often. Especially after touching the infected area or applying cream.
No sharing, even if you “only used it for hands”. One towel per person, washed frequently.
Wash bedding, towels, and clothes regularly while it’s active. If your child’s sores are on the face, don’t forget pillowcases.
It reduces scratching damage and bacteria under nails. If your child is a determined picker, keeping nails short really does help.
If the sores are in a place that can be lightly covered without rubbing or trapping moisture, it can reduce contact. Don’t occlude it so much that it stays damp.
This is the toughest bit with younger kids. You’re not going to stop cuddles entirely, and you shouldn’t feel guilty about that. Just be sensible: avoid face-to-face rubbing, keep hands clean, and don’t share towels.
Most impetigo settles without anything scary happening, but you should get prompt medical advice if:
If you’re ever on the fence, it’s better to ask than to “wait and see” while it spreads.
Treat it early, stick to the 48-hour rule, and go heavy on the hygiene for a few days. Impetigo is one of those infections that doesn’t care how tidy your house is or how nice your nursery is. It cares about contact and shared stuff.
Break that chain, and it tends to burn out quickly.
Self Care and Health
