A fever of 100.4°F or higher, vomiting more than twice in 24 hours, or diarrhea that causes accidents are the clearest signs your child should stay home. Beyond those bright lines, the decision gets murkier. Here’s how to sort through the most common scenarios so you can make a confident call on any given morning.
The Four Symptoms That Always Mean Stay Home
The CDC identifies a short list of symptoms that should keep a child out of school:
- Fever. Any temperature at or above 100.4°F (38°C), especially with a new rash.
- Vomiting. More than twice in the preceding 24 hours.
- Diarrhea. Loose stools that cause accidents, contain blood, or represent more than two extra bowel movements beyond what’s normal for your child in a 24-hour period.
- Contagious conditions requiring treatment. Strep throat, impetigo, scarlet fever, or other infections that need antibiotics before a child can safely be around classmates.
If none of these apply and your child just has a runny nose, mild cough, or general tiredness, they’re usually fine to attend. A child who feels well enough to eat breakfast, play, and carry on a normal conversation can almost always handle a school day.
The 24-Hour Rule for Fever
The standard across most schools and pediatric guidance is simple: your child needs to be fever-free for at least 24 hours, without using any fever-reducing medication like ibuprofen or acetaminophen, before going back. This applies to any illness that caused a fever, whether it’s the flu, COVID, RSV, or a random virus.
The key detail parents sometimes miss is the “without medication” part. If your child’s temperature only stays normal because they took something that morning, the 24-hour clock hasn’t started yet. Wait until the fever stays down on its own for a full day.
If your child returns to school and then develops a fever again or starts feeling worse, the CDC recommends pulling them back out and restarting the 24-hour countdown once symptoms improve and the fever breaks again on its own.
Returning After a Stomach Bug
Stomach viruses are highly contagious, and the vomiting and diarrhea thresholds exist for good reason. But once the worst passes, most schools follow the same 24-hour framework: your child can return once they’ve gone a full day without vomiting or abnormal diarrhea and any fever has resolved without medication.
In practical terms, if your child last vomited at 2 p.m. on Tuesday, the earliest they should go back is Wednesday afternoon, though most parents wait until Thursday morning to be safe. Make sure they can keep down bland food and stay hydrated before sending them in.
Colds, Coughs, and Respiratory Viruses
A lingering cough or stuffy nose after a cold doesn’t require staying home, and this is where many parents second-guess themselves. Kids can have residual congestion and a mild cough for a week or two after a respiratory virus. If symptoms are clearly improving overall and there’s been no fever for 24 hours, your child is typically past the most contagious phase and can return.
This guidance now applies uniformly to COVID, flu, and RSV. The CDC consolidated its respiratory virus recommendations: all three follow the same return criteria. No specific test result or quarantine period is required. The focus is on whether symptoms are trending better and the fever is gone.
That said, your child is still shedding some virus even after they meet the return criteria. It takes longer for the body to fully clear an infection than it does to feel better. For the first few days back, having your child wash their hands frequently and cover coughs makes a real difference.
Strep Throat
Strep is one of the few illnesses with a specific, short timeline. A child with strep throat becomes non-contagious within 12 hours of taking their first dose of antibiotics. Most schools require those 12 hours to pass before the child returns, so if your child takes antibiotics at dinnertime, they can typically go back the next morning.
The catch is that strep needs a diagnosis and prescription first. If your child has a sore throat with fever, no cough, and possibly swollen glands or a sandpaper-like rash, those are reasons to get a rapid strep test rather than just waiting it out at home.
Pink Eye, Rashes, and Skin Infections
Pink eye has a reputation as an automatic send-home, but that reputation is outdated. Conjunctivitis alone does not typically require school exclusion unless there’s an active outbreak or a doctor specifically recommends it. A child with mild pink eye, no fever, and otherwise normal energy can usually attend.
Rashes are trickier because they have so many possible causes. A new, undiagnosed rash paired with fever is a reason to stay home and see a doctor. A rash without fever that you already know is eczema, an allergic reaction, or a healing bug bite is generally fine. School staff can exclude a child with an unidentified rash until a doctor confirms it’s not contagious, so having a quick telehealth or in-person visit can save you multiple missed days.
Impetigo, a bacterial skin infection that causes crusty sores, does need antibiotic treatment. Ringworm needs antifungal treatment. In both cases, your child can return once treatment has started and affected areas can be covered.
Head Lice
Head lice do not require leaving school early. Both the American Academy of Pediatrics and the National Association of School Nurses recommend against the old “no-nit” policies that kept kids home until every last egg was gone. The reasoning is straightforward: nits glued to hair shafts don’t transfer to other children, many nits found during school checks are already empty shells, and misdiagnosis by non-medical staff is extremely common.
The current recommendation is that a child with lice finishes the school day, gets treated at home that evening, and returns to class the next day. No days missed.
The Gray Area: Mild Symptoms
The hardest calls are the in-between mornings. Your child says they don’t feel great but has no fever, no vomiting, and no obvious contagious illness. Here’s a practical framework:
- Can they participate? If they’re too tired or uncomfortable to sit through class, learn, and get through the day, staying home makes sense for their sake even if they’re not contagious.
- Are symptoms getting worse or better? A child on the upswing of a cold is different from one whose symptoms started last night and are still ramping up. Early-stage illness often gets worse by midday, which means a pickup call from the school nurse.
- Is something going around? If half the class is out with a stomach virus and your child has a vague stomachache, erring on the side of caution protects both your kid and the rest of the school.
Anxiety about school can also show up as stomachaches, headaches, and fatigue. If your child frequently feels sick on school mornings but improves on weekends, that pattern is worth exploring with their pediatrician or school counselor rather than treating each episode as a potential illness.