Hand, foot, and mouth disease is the illness parents most often get wrong in both directions: kept home too long when the child is fine, sent in too early when the child has a fever. The rule is narrower than the rash makes it look.
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A child with hand, foot, and mouth disease stays home only while they have a fever, cannot take part in the day, or have uncontrolled drooling from mouth sores. Per the U.S. Centers for Disease Control and Prevention (CDC) and the American Academy of Pediatrics (AAP), the rash itself is not grounds for exclusion. The blisters do not have to clear before return.
Hand, foot, and mouth disease is a common, usually mild viral illness, most often caused by coxsackievirus, per the CDC. It brings a few days of fever and sore throat, then mouth sores and a rash of small blisters on the hands, feet, and sometimes the buttocks. It is most common in children under five, which is exactly the daycare population, so a center will see it every year.
It looks alarming and is rarely serious. The discomfort that matters for daycare is the mouth sores, because a child who will not drink can get dehydrated, and a child drooling uncontrollably is shedding virus onto every surface they touch.
Only under specific conditions. Per CDC and AAP guidance, a child should stay home from daycare when any of the following is true: they have a fever, they feel too unwell to take part in normal activities, or they have mouth sores with drooling they cannot control. A child with the rash but none of those is not excludable under national guidance.
| Situation | Standard action (CDC / AAP 2023) |
|---|---|
| Fever 100.4°F (38°C) or higher | Stay home until fever-free 24 hours without medicine |
| Uncontrolled drooling with mouth sores | Stay home until controlled |
| Too unwell to participate, not eating or drinking | Stay home until able to take part |
| Rash or blisters only, no fever, acting normally | May attend under national guidance |
| Blisters present but drying | Not a reason to exclude; sores need not be healed |
Watch the fever row. It is the same standard as our daycare fever policy: 100.4 degrees Fahrenheit sends a child home, and they return after 24 hours fever-free without medicine. Most hand, foot, and mouth exclusions are really fever exclusions wearing a rash.
A child returns once they have no fever, can take part in the day, and have no uncontrolled drooling, per the CDC. That is the whole test. The AAP states plainly that sores do not need to be healed for a child to come back. Waiting for a clear rash keeps a healthy child home and does little to stop spread.
Where centers fail the standard. The most common error I saw was a center excluding any child with visible blisters "until the rash is gone," sometimes for a week or more. That is stricter than the CDC and AAP, costs families work days, and gives a false sense of safety, because the virus sheds for days to weeks after the rash fades and well before it appears. The honest position: you cannot exclude your way out of hand, foot, and mouth. Clean hands and surfaces do the real work.
The virus spreads through saliva, nose and throat fluids, fluid from the blisters, and stool, per the CDC. In a daycare room that means shared toys, mouthed objects, diaper changes, and unwashed hands. The hard truth: an infected child is contagious before the rash shows and can shed virus in stool for weeks after recovery. By the time you see the blisters, the room has already been exposed.
That is why prevention beats exclusion here. The defenses that actually reduce spread are the daily ones: rigorous handwashing at every transition, careful diapering, and sanitizing toys and surfaces on the schedule in Caring for Our Children Appendix K. See our guides to handwashing and hygiene and the broader daycare illness exclusion guidelines for how a well-run room handles outbreak season.
A good infant or toddler room will answer these without defensiveness. If the answers are vague, that is the signal, not the rash.
Bring these into a full visit using our daycare tour questions guide. A center that can show its written policy and its cleaning schedule is telling you it runs to standard.
Hand, foot, and mouth disease is mild, common, and over-managed. The daycare rule, per CDC and AAP guidance, is narrow: stay home for fever, inability to participate, or uncontrolled drooling, and return when those resolve, with no need to wait for the blisters to clear. Match the fever rule, expect your center to clean hard rather than exclude wide, and read the handbook so you know which standard your program actually follows.
How licensing, health rules, and exclusion policies fit together.
Read the pillar → Sibling spokeThe 100.4 line and the fever-free-for-24-hours rule, explained.
Read the article → Sibling spokeThe daily routines that actually slow an outbreak in the room.
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