Hand, foot, and mouth disease at daycare.

Hand, foot, and mouth disease — HFMD — is one of the most predictable rites of passage in a daycare classroom. Every center sees it, usually more than once a year, often in late summer and early fall. It is uncomfortable for the child for three to five days, mildly contagious for one to two weeks after symptoms start, and rarely serious. It is also one of the most-googled illnesses among first-time daycare parents, partly because it sounds alarming and partly because the AAP exclusion guidance has shifted over the years in ways that confuse families.

This guide explains what HFMD actually is, how it spreads in a classroom, what current AAP and CDC exclusion guidance says, what good daycares do during an outbreak, and how to manage it at home.

What HFMD is

HFMD is a viral illness, most often caused by coxsackievirus A16 and enterovirus 71. It mostly affects children under 5. The classic course is:

• Days 1 to 2: fever (often 101° to 103°F), sore throat, irritability, reduced appetite.
• Days 2 to 4: small red spots and blisters on the hands, feet, around the mouth, and sometimes on the buttocks and inner thighs. Painful mouth sores (herpangina) on the tongue, gums, and inside the cheeks.
• Days 5 to 7: blisters scab over and resolve. Fever has usually broken by day 3 or 4.
• Through approximately day 14: the virus continues to be shed in stool and respiratory secretions, even after rash clears.

Most healthy children recover fully without intervention. AAP notes that complications are rare, with the most common being dehydration (from refusing to drink because of mouth pain) and the most serious being secondary bacterial infection of blisters. EV-71 in particular can rarely cause more severe disease, but the vast majority of US cases are coxsackievirus A16.

Why daycare spreads it efficiently

HFMD spreads through respiratory droplets, contact with blister fluid, and the fecal-oral route (yes — diaper changes). A toddler classroom with shared toys, shared snack tables, and frequent diaper changes is the textbook transmission environment. CDC notes the virus survives on surfaces for days. Once one case is in a classroom, two to four follow-on cases within ten days is typical.

Outbreaks are most common in July through October, but HFMD circulates year-round. A center that has a written respiratory and gastrointestinal virus protocol — as covered in our RSV piece and our norovirus piece — will manage HFMD better simply because the same handwashing, surface disinfection, and exclusion habits apply.

What AAP exclusion guidance actually says

Here is where confusion enters. Current AAP / NRC guidance in Managing Infectious Diseases in Child Care and Schools states that children with HFMD do not need to be excluded from child care solely because of the rash, provided they meet the standard return-to-care criteria:

In practice, many individual daycares set stricter policies than AAP minimum. Some exclude until rash fully resolves; some exclude for 7 days from symptom onset; some follow AAP literally. All three are legal. State licensing typically requires the center to publish its specific policy in the parent handbook, and to apply it consistently.

If your center's published policy is "exclude until blisters are fully healed," the center is operating above AAP minimum, which is its prerogative and not unreasonable. Ask up front during enrollment what the policy is so the first missed week of work is not a surprise. See also our companion piece on daycare illness policy.

What a good center does during an outbreak

When a confirmed HFMD case appears in a classroom, the operational checklist looks like this:

• Notify all parents in the affected classroom — usually same-day, by email or app notification. Most states require notification.
• Escalate handwashing — staff and children, before and after every transition.
• Sanitize toys daily (and remove anything that was mouthed during the day for end-of-day cleaning).
• Disinfect changing tables, diaper pails, doorknobs, and snack surfaces with EPA List Q (or equivalent enterovirus-effective) disinfectant.
• Watch other children in the room for fever or mouth sores; alert parents at the first sign.

Centers that pre-empt the conversation with a printable HFMD handout in the cubby room are doing more than the minimum.

How to manage it at home

HFMD is mostly a hydration and comfort game. The mouth sores are the worst part for most children, and pain in the mouth causes refusal to drink. AAP recommends:

• Cold liquids — milk, water, diluted juice, popsicles, smoothies — to numb the mouth sores. Avoid acidic juices (orange, lemon) which sting.
• Soft, cool foods — yogurt, applesauce, oatmeal, mashed potato, ice cream.
• Acetaminophen or ibuprofen (per pediatrician dosing, per age) for fever and mouth pain. Avoid aspirin.
• Topical magic mouthwash is sometimes prescribed for older children but is not routinely recommended for under-3 unless prescribed.
• Hand hygiene for everyone in the household. The virus is on toys, bottles, sippy cups, and pacifiers. Wash them.

Call the pediatrician same-day if: the child refuses to drink for 8 hours or more, has no wet diaper for 8 hours, has a fever above 104°F, has a high fever lasting more than 3 days, has neurological symptoms (weakness, lethargy that does not match the level of illness, neck stiffness, seizures), or is under 6 months old. Dehydration from refusing to drink is the most common reason an HFMD case ends up in the ER.

The summer peak

HFMD cases peak in late summer and early fall in temperate climates, with secondary smaller peaks during winter. CDC surveillance data show August and September as the busiest months in most US regions. Centers in warmer states see year-round circulation; centers in Northeast and Midwest states see a more compressed seasonal pattern. A director who knows the local pattern and adjusts cleaning intensity around it is doing more than reacting case by case.

For families starting daycare in late summer — a common transition window because pre-K programs typically open in September — the first month is statistically the most likely time to see HFMD. That is normal. Centers experienced with first-time enrollments build extra notification and parent-communication time into August and September accordingly.

Can adults get it?

Yes, but less often. Most adults have immunity from childhood. When adults do get HFMD it is typically milder, though the same virus is responsible for atypical adult cases that can be uncomfortable. Caretakers and daycare teachers should handwash thoroughly after diaper changes and after any contact with blister fluid. Pregnant individuals should consult an obstetrician about HFMD exposure, particularly close to the due date.

What to ask your director

• "What is your specific HFMD exclusion policy? Is it the AAP minimum or stricter?"
• "How quickly do you notify parents when a confirmed case is in the classroom?"
• "How do you handle diaper changes during an HFMD outbreak?"
• "What disinfectant do you use on toys and surfaces — is it effective against enterovirus?"
• "Do you ever close a classroom during a multi-case outbreak?"

A center that has thought about each of these has been through outbreaks before — and that is what you want. The pillar guide on daycare quality and safety covers the broader framework for evaluating a center's illness response. For city-specific context, our Austin and other city pages note local health department reporting requirements where HFMD is tracked.