A fever of 100.4°F or higher, vomiting, and diarrhea are the clearest reasons to keep your baby home from daycare. But plenty of other situations fall into a gray area, and most daycares have their own policies that may be stricter than medical guidelines. Here’s a breakdown of what actually warrants a sick day and what doesn’t.
Fever: The 100.4°F Rule
A temperature of 100.4°F (38°C) or above means your child stays home. This threshold is standard across most childcare facilities and pediatric guidelines. Your child can return after being fever-free for a full 24 hours without any fever-reducing medicine like acetaminophen or ibuprofen. That distinction matters: if the fever only stays down because of medication, the clock hasn’t started.
For babies younger than 2 months, the rules are stricter. Any temperature of 100.4°F or above, even without other symptoms, requires exclusion from daycare and immediate medical attention. At that age, fever can signal a serious infection that older children would fight off more easily.
Vomiting and Diarrhea
Two or more episodes of vomiting within a 12-hour period is the standard cutoff for keeping your child home. For diarrhea, the threshold is more than two loose stools beyond your child’s normal pattern, particularly if diapers can’t contain it or a toilet-trained child is having accidents.
For most stomach bugs, your child can return once the diarrhea or vomiting stops. Norovirus is the notable exception: daycares following public health guidelines require children to stay home for 48 hours after the last episode of diarrhea, not just until symptoms end. A few rarer infections like E. coli and Shigella require negative stool cultures and clearance from the health department before a child can go back, but your pediatrician will walk you through that if it applies.
Colds, Coughs, and Runny Noses
A runny nose alone is not a reason to stay home, regardless of the color or consistency of the discharge. Green or yellow mucus doesn’t automatically mean a bacterial infection. The same goes for a cough without fever or other signs of illness. If daycares excluded every child with a runny nose, they’d be half-empty from October through March.
The line changes when respiratory symptoms come with a fever. Any combination of cough, runny nose, or sore throat plus a temperature of 100.4°F or above means your child should stay home until the fever has been gone for at least 24 hours without medication and symptoms are improving overall. This applies to COVID-19, flu, RSV, and common colds alike. The CDC now uses a single set of return criteria for all respiratory viruses: 24 hours fever-free, symptoms improving, then five additional days of precautions like good hand hygiene around others.
Pink Eye
Pink eye is one of the most over-excluded conditions in daycare. The American Academy of Pediatrics states that antibiotic treatment is not required for a child to return to school or daycare. Eye discharge that’s yellow, green, white, or watery, even with redness in the whites of the eyes, does not require exclusion as long as the child has no fever. That said, individual daycare policies vary widely, and many still require a doctor’s note, antibiotic drops, or full symptom resolution before they’ll accept your child back. Check your facility’s specific policy, because it may be stricter than the medical guidance.
Strep Throat
If your child is diagnosed with strep throat, they need to be on antibiotics for at least 12 hours before returning to daycare. The CDC notes that 12 hours of appropriate antibiotic treatment significantly limits a person’s ability to spread the bacteria. The child also needs to be fever-free. Some facilities and outbreak situations call for a full 24 hours on antibiotics before return, so again, your daycare’s policy may set a slightly longer window.
Rashes and Skin Infections
Not every rash means a day at home. The key question is whether the rash is contagious and whether it’s been treated.
- Impetigo: Keep your child home until treatment has started. Sores should be covered until they dry out.
- Ringworm: Home until treatment begins, then back with the affected area covered.
- Hand, foot, and mouth disease: This one surprises many parents. Children with HFMD do not need to be excluded as long as they have no fever, feel well enough to participate in activities, and don’t have uncontrolled drooling from mouth sores. The virus sheds for weeks after symptoms resolve, so keeping kids home until they’re no longer contagious isn’t practical or recommended.
Head Lice
Head lice do not require immediate removal from daycare. CDC guidance is clear: a child with lice can finish the day, go home, start treatment that evening, and return to daycare the next day. Both the AAP and the National Association of School Nurses recommend against “no-nit” policies, which keep children out until every last egg is gone. Nits can remain attached to hair after successful treatment, but the crawling lice will be dead. Some daycares still enforce no-nit rules, but the medical consensus has moved away from them.
The “Can’t Keep Up” Test
Beyond specific symptoms, there’s a general guideline that applies across the board: if your child can’t comfortably participate in normal daycare activities or needs more one-on-one care than staff can reasonably provide, they should stay home. A baby who is unusually lethargic, inconsolable, or just clearly not themselves may need a rest day even without a specific diagnosis. Daycare staff are caring for multiple children at once, and a child who needs constant holding or monitoring is better off at home recovering.
This is also useful as a gut check for borderline situations. A mild cough with a happy, active child? Probably fine. The same cough paired with a child who won’t eat, won’t play, and just wants to be held? That child isn’t ready.
Your Daycare’s Policy May Be Stricter
Medical guidelines set minimum thresholds, but individual daycare centers often go further. Many require 24 to 48 hours symptom-free for vomiting and diarrhea even when health departments only require symptoms to stop. Some still exclude for pink eye or demand doctor’s notes for conditions that don’t medically require them. Ask your daycare for their written illness policy early on so you’re not caught off guard on a workday morning. Knowing the rules ahead of time helps you plan backup care and avoid the frustrating call to come pick up your child for something you could have anticipated.