Most daycare-worthy illnesses come down to three questions: Does your child have a fever? Are they vomiting or having diarrhea? Can they actually participate in the day’s activities? If the answer to the first two is no and the last one is yes, your child can probably go. But the specifics vary by illness, and some conditions have stricter timelines than others.
Fever Is the Clearest Reason to Stay Home
A child with a fever should stay home, full stop. The standard threshold most daycares and pediatric guidelines use is 100.4°F (38°C) or higher. But the rule isn’t just about hitting that number once. Your child needs to be fever-free for at least 24 hours without using any fever-reducing medication before going back. That means no ibuprofen or acetaminophen masking the temperature. If you give medicine in the morning and the fever stays away all day, the 24-hour clock starts from the last dose, not from when the fever broke.
This 24-hour rule applies whether the fever comes with a cough, a runny nose, a sore throat, or no other symptoms at all.
Vomiting and Diarrhea
If your child has vomited two or more times in the past 24 hours, they should stay home. For diarrhea, the benchmark is more than two loose stools beyond what’s normal for your child in a 24-hour period. Stools that contain blood or mucus are also automatic exclusions.
The practical rule: keep your child home until they’ve gone a full 24 hours without vomiting and their stools have returned to normal. Stomach bugs spread fast in daycare settings because toddlers touch everything and wash their hands inconsistently. One sick child in a room of twelve can easily become six sick children by the end of the week, so this is one area where daycares tend to be strict.
Coughs, Colds, and Respiratory Viruses
A mild runny nose by itself isn’t a reason to stay home. Kids in daycare average eight to twelve colds a year, and if every sniffle meant a day at home, no parent would ever get to work. The CDC’s current guidance says children with respiratory symptoms should stay home when those symptoms are worsening or not improving, and when they can’t be explained by something else like seasonal allergies.
Your child can return when two conditions are met: no fever for at least 24 hours (without medication), and respiratory symptoms have been visibly improving for at least 24 hours. “Improving” doesn’t mean gone. A lingering mild cough after a cold is normal and not a reason to keep your child out. The key is the trajectory. If the cough is getting worse, the congestion is thicker, or your child seems more tired than yesterday, they’re not ready.
Strep Throat
Strep throat is one of the few illnesses with a specific antibiotic clock. Once your child starts the prescribed antibiotic, they need to be on it for at least 12 hours and be fever-free before returning to daycare. The American Academy of Pediatrics sets the minimum at 12 hours; some daycares round up to 24 hours to be safe. Check your facility’s policy, but medically, the 12-hour mark is when your child stops being contagious to others.
If your child tests positive for strep but hasn’t started antibiotics yet, they should absolutely stay home. Untreated strep spreads through respiratory droplets, and daycare environments make containment nearly impossible.
Hand, Foot, and Mouth Disease
Hand, foot, and mouth disease sounds alarming, but the CDC’s guidance is more lenient than many parents expect. Children with HFMD can continue attending daycare 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 is most contagious in the first few days, but it can shed for weeks after symptoms resolve, which is why strict exclusion policies don’t make practical sense.
The blisters on hands and feet don’t need to be fully healed before your child goes back. If your child is acting like themselves, eating reasonably well, and meets the three criteria above, they’re clear.
Pink Eye (Conjunctivitis)
Pink eye is one of the most over-excluded conditions in daycare. Many facilities still send children home the moment they see a red, goopy eye, but medical evidence doesn’t support this. The American Academy of Pediatrics and the American Public Health Association both recommend that otherwise healthy children with conjunctivitis, including red or watery eyes, should not be excluded from daycare as long as they have no fever and no behavior changes.
There’s no evidence that isolating children with bacterial or viral conjunctivitis reduces transmission in meaningful ways. If your daycare requires antibiotic drops before return, that’s their policy rather than a medical standard. Children who appear systemically ill (fever, lethargy, significant swelling) are the exception and should stay home until those signs resolve.
Head Lice
Head lice are not a medical reason to miss daycare. The CDC is clear on this: a child with lice does not need to leave early. They can finish the day, go home, start treatment that evening, and return the next morning. Both the American Academy of Pediatrics and the National Association of School Nurses recommend against “no-nit” policies, which require children to be completely free of nits (lice eggs) before returning. Here’s why those policies are outdated:
- Nits close to the scalp are the only ones likely to be viable. Most nits found during checks are more than a quarter inch from the scalp and are either empty shells or unlikely to hatch.
- Nits don’t transfer between children. They’re bonded to the hair shaft and aren’t going to fall onto another child’s head.
- Misdiagnosis is common. Non-medical staff frequently mistake dandruff, hair debris, or dried product for nits during school checks.
Keeping a child home for days over nits causes far more harm, in missed learning and parental work disruption, than lice pose as a health risk.
The Participation Test
Beyond specific illnesses, there’s a general principle that applies across the board: can your child participate in the day? Daycare staff care for multiple children at once. A child who is too tired to join activities, too fussy to be comforted by normal means, or so clingy that they need constant one-on-one attention is going to struggle, and so will the staff. This isn’t about a slightly cranky morning. It’s about whether your child can reasonably function in a group setting that day.
If your child doesn’t have a fever, isn’t vomiting, and doesn’t have diarrhea but is clearly off, sitting listlessly, refusing food and drink, or crying inconsolably, that’s still a day to stay home. Trust your read of your own kid. You know the difference between “woke up grumpy” and “something isn’t right.” The first one resolves by drop-off. The second one usually doesn’t.
Common Conditions That Don’t Require Exclusion
Several conditions routinely trigger unnecessary absences. Beyond pink eye and lice, children with the following can generally attend daycare without restrictions:
- A runny nose without fever and with otherwise normal energy and behavior.
- A mild cough that’s improving and isn’t accompanied by fever or worsening symptoms.
- A rash without fever that hasn’t been identified as requiring exclusion by a healthcare provider. Many childhood rashes are viral and non-contagious by the time they appear.
- Ear infections, which are not contagious. The underlying cold that caused the ear infection may have been, but the infection itself isn’t something other children can catch.
When in doubt, your daycare’s sick policy is the document that matters most on a practical level. Policies vary, and some facilities are stricter than medical guidelines recommend. Knowing your daycare’s specific rules ahead of time saves the stress of a morning phone call when your child wakes up with something questionable.