Chickenpox and Nursery: When Can Your Child Go Back?

A few red dots appeared on your child's back overnight, and one of them already has a small blister on top. You know straight away what it is — and the first question is not really about the illness. It is about the week ahead.

Here is the short version: in otherwise healthy children chickenpox is usually mild, and the nursery question has one clear answer that does not depend on anybody's judgement. You do not have to negotiate it, you just have to know it.

When your child can go back, how long they are infectious, who you need to keep them away from and what helps with the itching — in that order.

When can your child go back to nursery with chickenpox?

Keep your child off school or nursery until all the spots have crusted over. That is usually about 5 days after the spots first appeared — but the crusting is what decides it, not the calendar. If new blisters are still appearing on day five, the date moves.

That single rule is easier to apply than it sounds, as long as you know which day was day one. Write down the date the first spot appeared, then check the skin each morning rather than trying to remember what it looked like yesterday.

The other half of the rule is about everyone else. Chickenpox can be dangerous for newborn babies, for anyone who is pregnant and for anyone with a weakened immune system, so keep your child away from them while the spots are still open. If you have already been in contact with someone in one of those groups, tell them rather than waiting to see what happens.

Which signs need help straight away?

Most cases run their course at home with nothing more than fluids, cool creams and patience. A few do not, and the signs to watch for are mostly about the skin around the blisters, breathing, and how much your child is drinking.

Alongside that, the ordinary school rule still applies: if your child has a high temperature, keep them off nursery until it goes away — even if the spots have already scabbed over. And if you are ever unsure whether a rash is chickenpox at all, our guide on a child's rash and when to see a doctor helps you tell the common ones apart.

How does chickenpox usually progress?

Spots typically appear around 1 to 3 weeks after your child was exposed, which is why the source is often impossible to pin down. The rash then moves through three stages: it starts as small spots, the spots become blisters filled with fluid, and the blisters become scabs.

What confuses many parents is that the stages overlap. New spots keep appearing while older ones are already crusting, so at any moment your child has all three stages on the skin at once. That mixed picture is normal and is not a sign that something is going wrong.

Your child is infectious from 2 days before the spots appear until they have all formed scabs, which is usually 5 days after the spots appeared. That first part is the reason chickenpox spreads so effectively through a nursery room: by the time anyone sees a spot, the other children have already been exposed. The same is true of a lot of nursery illnesses — our article on why siblings keep passing things on explains the pattern.

What helps with the itching?

Quite a lot, and none of it is complicated. Drink plenty of fluids and try ice lollies if your child is not drinking much. Use cooling creams or gels from a pharmacy, and ask your pharmacist about antihistamine medicine to help with the itching.

Bathe your child in cool water and pat the skin dry rather than rubbing it, and dress them in loose clothes.

For the scratching itself: cut your child's fingernails and put socks on their hands at night. Try not to let them scratch the spots, as scratching can cause scarring — and open blisters are also how the fluid spreads.

What about brothers and sisters?

If a sibling has not had chickenpox and is not vaccinated, they will very likely catch it — usually one to three weeks later, since that is how long it takes for spots to appear after exposure. The school and nursery rule is about the child who actually has the spots; if you are unsure whether a well sibling should stay at home, ask the nursery or get advice from NHS 111.

What changes is your planning. Two children with chickenpox two weeks apart means the household is dealing with it for roughly a month, and the second round is the one that catches parents out because the first one felt like the whole thing. Note the date of exposure for the sibling too, so you know when to start watching for spots rather than being surprised by them.

If anyone in the household is pregnant, has a weakened immune system or there is a newborn baby at home, get help from NHS 111 rather than working it out yourselves.

How do you keep track of it all?

Three things matter over the course of chickenpox: the date the rash started, whether new blisters are still appearing, and how your child's temperature is behaving. Those three answers decide both the nursery date and whether the illness is still running a normal course.

That is exactly what Mona holds for you. You log the first day of the rash, add a ten-second note each morning about whether new spots have appeared, and the temperature chart shows the whole week rather than isolated moments. Whoever gets up in the night makes the entry, and the other one sees it in the morning.

If you do end up speaking to a GP, they will ask when the rash started, whether it is still spreading, how high the temperature has been and when your child last had paracetamol. Those are the four answers that are hardest to reconstruct after several broken nights — and the easiest to have ready if you wrote them down. Our article on why your memory fails at the GP explains why that is not a personal failing.

Is there a chickenpox vaccine in the UK?

Yes. Children are offered protection against chickenpox as part of the MMRV vaccine — which covers measles, mumps, rubella and chickenpox — at 12 months and 18 months old. Additional doses are offered to older children born on or after 1 January 2020.

The vaccine is also offered to people in close contact with someone at higher risk of becoming seriously ill from chickenpox, including healthcare workers who have contact with patients and are not immune. Two doses are needed, usually 4 to 8 weeks apart, or 3 months apart for babies aged 9 to 12 months.

Common questions about chickenpox and nursery

How long exactly does my child have to stay off nursery?

Until all the spots have crusted over, which is usually about 5 days after the spots first appeared. If fresh blisters are still coming through, the clock has not run out yet. Check the skin each morning rather than counting days on their own.

Does the nursery need a note from the GP?

Most cases of chickenpox do not need a GP appointment at all, so a note is not usually something you will have. Tell the nursery as soon as you know, and ask them what they need for the return — settings handle the paperwork differently even though the health advice is the same.

Can my child get chickenpox twice?

Most people only get chickenpox once, and having had it usually gives lasting protection. The virus does stay in the body afterwards, though, and can become active again much later in life as shingles.

Is my child infectious before the spots appear?

Yes — from 2 days before the spots appear. That is why it is almost impossible to stop chickenpox spreading in a nursery room: by the time the first blister is visible, the other children have already been exposed.

Can we go outside during chickenpox?

Fresh air in your own garden is fine. What to avoid is anywhere you might come across a newborn baby, someone who is pregnant or someone with a weakened immune system — so no playgroups, and phone ahead rather than sitting in a GP waiting room.

My child had the vaccine and still has spots. Is that normal?

It happens, and it usually means a milder illness with fewer spots. The nursery rule does not change though: they still stay off until every spot has crusted over. If you are unsure whether what you are looking at has crusted, get advice from NHS 111 rather than guessing.

Summary: nursery, 111, or wait it out?

Situation	What to do
Skin around the blisters red, hot or painful; child more breathless; signs of dehydration	Get help from NHS 111 now
A newborn, someone pregnant or someone immunosuppressed has been exposed	Get help from NHS 111 now
First spots appeared	Tell the nursery, keep your child at home, note the date
High temperature, spots still open	Stay off nursery, fluids and paracetamol, log the course in Mona
All spots crusted over and the temperature gone	Back to nursery