The Thermometer Is Not the Whole Decision

Twenty past seven, and he is sitting on the third stair with his shoes half on, saying his throat hurts in the voice he uses when it might and might not.

You have eleven minutes. You have a meeting at nine that you already moved once. And the thermometer says 99.1, which is a number that decides nothing at all.

That is the short version, and it holds for almost every morning you will have between now and March. The rest of this page is for the mornings where it does not feel that clean, which is most of them.

The four questions that actually decide it

American paediatric guidance, and the exclusion rules almost every US school district copies from it, boils down to four things. Not a diagnosis. Four practical questions you can answer in the hallway.

• Do they have a fever? 100.4°F or higher, taken properly, is the line. Below that is not a fever, whatever their forehead feels like.
• Are they contagious in a way that spreads in a classroom? Vomiting, diarrhoea, an undiagnosed rash, conjunctivitis with discharge, untreated strep in the first 12 hours of antibiotics.
• Can they take part? A child who cannot lift their head off the desk is not learning, and the teacher becomes a nurse for the day.
• Do they need care you cannot give at school? Constant nose-blowing help, a dressing that needs changing, medicine on a schedule nobody there can run.

If all four are no, they go. That includes the child with green mucus running to their chin, which brings us to the myth that has cost more school days than any actual virus.

Green snot means nothing, and that is not a folk opinion

The colour of mucus comes from an enzyme released by the white blood cells doing their job. Yellow and green are a sign the immune system turned up, not a sign that bacteria have won and antibiotics are needed. The American Academy of Pediatrics has been saying this in plain language for years on HealthyChildren.org, and it still surprises most parents at the school gate.

Same story with the cough that hangs around. A cough after a cold can last three weeks, sometimes longer, and it does not mean they are still infectious for three weeks. Young children pick up something like six to eight colds a year, which means that on the strictest reading of “keep them home if they are coughing” a five year old would miss most of the winter term.

Fever, and the number people get wrong

Take it under the arm and add nothing. Take it in the ear or under the tongue and read it as it comes. What you are looking for is 100.4°F (38°C) or above, and what matters almost as much is what the child looks like at that temperature.

A child with 101 who is asking for toast and arguing about the television is in better shape than a child with 99.8 who is grey and floppy and will not drink. Guidance uses the number because a number can be written into a school policy. You have information the policy does not.

Ring the doctor rather than the school if a fever lasts more than three days, if a baby under three months has any fever at all, if there is a rash that does not fade under a pressed glass, or if breathing looks like hard work. That last one is the one parents most often talk themselves out of. If the cough is a barking, seal-like noise that arrives after midnight, that is croup and it has its own set of rules.

Vomiting, and the thing about the 24 hours

One vomit at four in the morning with nothing since, and a child who ate breakfast, is usually not a sick day. Two vomits, or any diarrhoea, and they stay. Norovirus goes through a classroom like a rumour, and a child is generally infectious for a day or two after the symptoms stop.

Most schools ask for 24 hours clear. Some ask for 48. Look yours up once, put it in your phone, and stop relitigating it at 7am with a child watching your face for a decision.

When it is the same complaint every Monday

A stomach ache that appears on school mornings and lifts by ten past nine is real. It is genuinely felt, genuinely painful, and it is almost never an infection. Anxiety lives in the gut in children far more than it lives in the head, and a child who cannot say “I am dreading the swimming lesson” can absolutely say “my tummy hurts”.

The pattern gives it away: weekdays and not weekends, mornings and not evenings, and no fever ever. We have written the longer version of this in the piece on morning stomach aches, and if the refusal has gone past the odd Monday, school refusal is a different animal again and worth reading before you make a rule about it.

The tempting move is to keep them home once, to be kind. It is kind. It also teaches the stomach ache that it works, and the second week is harder than the first. Going in late is usually better than not going.

What a sick day should actually look like

Not the sofa with a tablet for nine hours, if you can help it. A child who has an excellent time at home has a reason to be ill again on Thursday, and that is not manipulation, it is just how brains work.

Quiet room, curtains half shut, water they can reach, and books or audio rather than a screen. The usual screen rules matter more on a sick day, not less. Small food, offered rather than pushed. Sleep if it comes. Boring is the therapeutic ingredient here, and it is the one nobody prescribes.

Then let them go back a bit before they are gleaming. Waiting for a child to be 100 per cent is how a two day virus becomes a nine day absence, and and the returning gets harder every extra morning you leave it. Send a note to the teacher saying they are still tired. Teachers are good with that.

The bit nobody says out loud

Half of the difficulty in this decision has nothing to do with the child. It is the meeting, the manager, the fact that you used your last flexible day in October. That pressure is real and it deserves naming rather than being smuggled into a medical judgement.

So make the call on the four questions first, on their own, and sort out the work problem second. In that order the answer is usually obvious within about fifteen seconds, and you stop carrying it around all day wondering.