Back-to-School Illness Guide for Preschoolers
The 24-Hour Fever Rule, Handwashing, and When to Call the Doctor
A Roots and Wings Podcast Recap from Fox Hill School
Every September, the same question lands in preschool parents' inboxes: why does my child suddenly seem to catch every cold going around? If you've noticed more sniffles, fevers, and sick days once your child started group care, you're not imagining it — and you're not alone.
On this episode of Roots and Wings, the podcast from Fox Hill School, host and Executive Director Melanie Little sits down with Colleen Shea, a pediatric nurse practitioner in the pediatric emergency department at Salem Hospital, Fox Hill's volunteer healthcare consultant, and a Fox Hill parent herself. Together they break down exactly what parents need to know about back-to-school illness season — from fevers to handwashing to the rule every daycare and preschool parent has questions about: the 24-hour fever-free policy.
Below is a full recap of their conversation, plus the key takeaways every Fox Hill family (and any preschool parent) should bookmark for the school year ahead.
Why Kids Get Sick More Often When They Start Preschool
If your child seems to catch everything the first year of school, there's a simple explanation: it's often their first real exposure to a group setting.
As Colleen explains, when children who haven't been in daycare start preschool, their immune systems are meeting a wide range of new germs for the first time — through shared toys, close play, sneezes, and coughs. The result is often a run of "firsts": the first cold, the first fever, the first stomach bug, maybe even the first case of strep throat.
The good news: this is completely normal, and it's actually a sign of a healthy immune system doing exactly what it's supposed to do. Each illness helps build immunity, which tends to mean fewer sick days in elementary school and beyond. Parents who make it through a rough first year at preschool often find their child barely misses a day of school once they move up.
Understanding Fever in Young Children: What's Normal (and What Isn't)
Fever is one of the most common — and most confusing — symptoms parents deal with. Here's how Colleen breaks it down:
What counts as a fever? A temperature of 100.4°F or higher. A "low-grade" temperature around 99°F is not considered a fever.
What does a fever actually mean? It's the body's alarm system — a sign that it's actively working to fight off a virus or bacteria.
Do you have to treat every fever? No. The number on the thermometer matters less than how your child is acting. A child who is playful, eating, drinking, and acting like themselves can have a fever of 101°F — or even 104°F — and be fine without medication.
When should you treat it? When your child seems lethargic, "just not themselves," uncomfortable, or generally "blah." Fever-reducing medication like Tylenol or ibuprofen won't make the illness resolve faster — it's purely for comfort while the body does its work.
Bottom line: treat the child, not the number.
The 24-Hour Fever-Free Rule, Explained
Every Fox Hill parent handbook — and most licensed early education programs — includes the same requirement: a child must be fever-free for 24 hours before returning to school, without the help of fever-reducing medication. It's a rule many parents find confusing, so Colleen walked through exactly why it exists.
Here's the scenario she uses to explain it:
Imagine your child wakes up with a fever at 7 a.m. That counts as a "fever day" for the entire day — even if you treat it with medication and they seem fine by dinnertime. You still need to keep them home the following day, medication-free, to see whether the fever returns.
Why is this necessary? Two reasons:
They may still be contagious. Sending a child back too soon risks spreading whatever illness they had to classmates and teachers.
The fever may not be fully gone. A child can look better in the evening and spike a fever again the next day — a sign their body is still fighting the illness.
The 24-hour rule protects your own child's recovery as much as it protects the rest of the classroom.
When to Call the Doctor: Red Flags Parents Should Know
Most mystery fevers and nasal congestion resolve on their own within a few days and can be safely managed at home with Tylenol or Motrin, plenty of fluids, and rest. But Colleen shared clear guidelines for when it's time to call your pediatrician:
Fever lasting 3 days or more despite fever-reducing medication
Difficulty breathing
Decreased fluid intake or noticeably fewer wet diapers/bathroom trips
A specific pain complaint (e.g., "my ear hurts") or visible discomfort beyond general fussiness
If none of these apply, it's generally safe to manage the illness at home and give your child's immune system time to do its job.
How Fox Hill School Helps Stop Germs From Spreading
While it's impossible to eliminate illness entirely in a group setting, Fox Hill's daily routines are built to minimize the spread of common germs:
Handwashing at every transition — arrival, before and after snack, before and after lunch, after outdoor play, and after using the bathroom
Gentle in-the-moment reminders from teachers when a child touches their face, picks their nose, or licks their fingers
"Elbow pit" coughing — teachers actively coach children to cough or sneeze into their elbow, then follow up with handwashing
Colleen emphasized that most upper respiratory infections spread through droplets and surface contact, which is exactly why frequent, well-timed handwashing is one of the most effective tools available — at school and at home.
Tips Parents Can Use at Home
Reinforcing these habits outside of school makes a real difference. Colleen's recommendations for families:
Model good habits. Kids learn hygiene by watching adults — washing hands after the bathroom and before meals sets the standard.
Practice the "elbow pit" cough at home so it becomes second nature.
Prioritize sleep hygiene. Consistent, age-appropriate bedtimes help support a healthy immune system and may reduce how often your child gets sick.
Keep a fever action plan in mind: treat for comfort if needed, watch behavior more than the thermometer, and know your 3-day and red-flag thresholds for calling the doctor.
Meet Fox Hill's Healthcare Consultant
Colleen Shea is a pediatric nurse practitioner in the pediatric emergency department at Salem Hospital and serves as Fox Hill School's volunteer healthcare consultant. Her daughter Delaney is a Fox Hill graduate, and her daughter Kennedy is a current student. Her contact information is available in the Fox Hill parent handbook, and she welcomes questions from Fox Hill families throughout the year — especially during high-volume illness season, when it can be hard to reach a pediatrician's office quickly.
This recap covers the highlights, but the full conversation includes even more detail and personal stories from Melanie and Colleen. Listen to this episode of Roots and Wings, the podcast from Fox Hill School, and subscribe for future episodes on early childhood health, development, and education.
Visit www.foxhill-school.com for more resources, parenting tips, and upcoming Roots and Wings episodes.
What temperature is considered a fever in preschoolers? A temperature of 100.4°F or higher is considered a fever. A reading around 99°F is not classified as a fever.
Do I need to give my child medicine every time they have a fever? Not necessarily. If your child is playful, eating, drinking, and acting like themselves, it's generally fine to let the fever run its course without medication. Treat with Tylenol or ibuprofen mainly for comfort if your child seems lethargic or uncomfortable.
How long does my child need to stay home after a fever? Most schools, including Fox Hill, require children to be fever-free for 24 hours without fever-reducing medication before returning.
Why do preschoolers get sick so often at the start of the school year? For many children, preschool is their first experience in a group setting, exposing their immune systems to a wide range of new germs. Frequent illness in the first year is normal and helps build long-term immunity.
When should I call the doctor about my child's fever? Call your pediatrician if a fever lasts three days or more, or if your child shows difficulty breathing, decreased fluid intake, or a specific pain complaint.
Comments