Medical Conditions

Hand, Foot, and Mouth Disease - How Long Is It Contagious?

Medically reviewed by Dr. Michael Okonkwo, MD, FAAP · Board-Certified Neonatologist

Content reviewed against published CDC, AAP, NIH guidelines

Editorial policy

Last reviewed:

If your baby has been diagnosed with or you suspect hand, foot, and mouth disease - how long is it contagious, here is what the evidence says.

The short answer

Hand, foot, and mouth disease (HFMD) is most contagious during the first week of illness, particularly in the first few days when the child has a fever. However, the virus can be shed in stool for weeks after symptoms resolve. The incubation period is 3-5 days (time from exposure to symptom onset). Most daycare and school policies allow children to return once the fever is gone for 24 hours and they can participate in activities. You cannot fully prevent spread once a child is symptomatic, as they were most contagious before anyone knew they were sick.

Key takeaways

  • Hand, foot, and mouth disease (HFMD) is most contagious during the first week of illness, particularly in the first few days when the child has a fever. However, the virus can be shed in stool for weeks after symptoms resolve. The incubation period is 3-5 days (time from exposure to symptom onset). Most daycare and school policies allow children to return once the fever is gone for 24 hours and they can participate in activities. You cannot fully prevent spread once a child is symptomatic, as they were most contagious before anyone knew they were sick.
  • Usually normal when: Multiple family members getting sick 3-5 days apart (expected given the incubation period)
  • Call your doctor if: Your child with HFMD is showing signs of dehydration from refusing to drink
“Fever itself is not an illness — rather, it is a sign or symptom that the body is fighting an infection. Fever stimulates certain defenses, such as the white blood cells, which attack and destroy invading bacteria.”
— Fever and Your Child, American Academy of Pediatrics (AAP)

Parents everywhere have the same worry. You are doing the right thing by looking into it.

What Parents Should Know

According to CDC, AAP, NIH guidelines, hand, foot, and mouth disease (HFMD) is most contagious during the first week of illness, particularly in the first few days when the child has a fever. However, the virus can be shed in stool for weeks after symptoms resolve. The incubation period is 3-5 days (time from exposure to symptom onset). Most daycare and school policies allow children to return once the fever is gone for 24 hours and they can participate in activities. You cannot fully prevent spread once a child is symptomatic, as they were most contagious before anyone knew they were sick. At 0-12 months, babies are less likely to get HFMD because they have fewer contacts, but they can catch it from older siblings or at daycare. HFMD is spread through: close contact with an infected person, respiratory droplets from coughs and sneezes, fluid from blisters, and contact with stool (diaper changes). If an older sibling has HFMD, try to limit direct contact, wash hands thoroughly (especially after diaper changes), and clean shared surfaces. Unfortunately, the virus is hardest to contain because children are most contagious before symptoms appear. It is generally considered normal when multiple family members getting sick 3-5 days apart (expected given the incubation period). However, you should contact your pediatrician promptly if your child with HFMD is showing signs of dehydration from refusing to drink.

Sources: [1], [2], [3]

Normal vs. Concerning

Usually Normal
Worth Discussing
Multiple family members getting sick 3-5 days apart (expected given the incubation period)
Your child with HFMD is showing signs of dehydration from refusing to drink
The rash and blisters taking 7-10 days to fully resolve
High fever lasting more than 3 days
A second child in the family getting a milder case (still normal)
Symptoms are worsening rather than improving after a week

When to Seek Immediate Care

  • Your child with HFMD is showing signs of dehydration from refusing to drink
  • High fever lasting more than 3 days
  • Symptoms are worsening rather than improving after a week
  • Your child is very young (under 6 months) and has symptoms

By Age

What to expect by age

0-12 months

Babies are less likely to get HFMD because they have fewer contacts, but they can catch it from older siblings or at daycare. HFMD is spread through: close contact with an infected person, respiratory droplets from coughs and sneezes, fluid from blisters, and contact with stool (diaper changes). If an older sibling has HFMD, try to limit direct contact, wash hands thoroughly (especially after diaper changes), and clean shared surfaces. Unfortunately, the virus is hardest to contain because children are most contagious before symptoms appear.

1-3 years

HFMD spreads rapidly in daycare settings. The contagion timeline: the child is contagious 1-2 days before symptoms appear, most contagious during the first week (especially while febrile), and continues shedding virus in stool for up to 4-6 weeks after recovery. Most daycares allow return once fever-free for 24 hours without medication and the child can eat and drink comfortably. Blisters do not need to be fully healed before returning. To reduce spread at home: frequent handwashing, clean and disinfect shared surfaces and toys, avoid sharing cups and utensils, and be diligent about hand hygiene after diaper changes.

What to Tell Your Pediatrician

  • Describe when you first noticed hand, foot, and mouth disease - how long is it contagious and how it has changed over time.
  • Note your baby's current age and which age-specific patterns you are seeing.
  • Mention if your child keeps getting HFMD repeatedly.
  • Mention if you are unsure when your child can return to daycare.
  • Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
  • Bring a list of any questions or observations you want to discuss at the appointment.

What Should You Do?

When to take action

Probably normal when...
  • Multiple family members getting sick 3-5 days apart (expected given the incubation period)
  • The rash and blisters taking 7-10 days to fully resolve
  • A second child in the family getting a milder case (still normal)
Mention at your next visit when...
  • Your child keeps getting HFMD repeatedly
  • You are unsure when your child can return to daycare
  • An outbreak is happening at your daycare and you want prevention guidance
Act now when...
  • Your child with HFMD is showing signs of dehydration from refusing to drink
  • High fever lasting more than 3 days
  • Symptoms are worsening rather than improving after a week
  • Your child is very young (under 6 months) and has symptoms

What You Can Do at Home

  • Keep track of when you notice hand, foot, and mouth disease - how long is it contagious — noting the time of day, duration, and any triggers can help your pediatrician.
  • Remember that multiple family members getting sick 3-5 days apart (expected given the incubation period) — this is generally within the range of normal.
  • At 0-12 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
  • Follow any care instructions from your pediatrician. Keep a written log of symptoms to bring to appointments.
  • While monitoring at home, seek immediate care if your child with HFMD is showing signs of dehydration from refusing to drink.

Hand, Foot, and Mouth Disease in Babies

Hand, foot, and mouth disease (HFMD) is a very common viral illness in babies and toddlers, especially during summer and fall. It causes small blisters or sores in the mouth and a spotted rash on the hands and feet. While it can make your child uncomfortable for a few days, it is not dangerous and resolves on its own within 7-10 days.

Coxsackie Virus (Hand, Foot, and Mouth Disease) in Baby

Coxsackie virus is the most common cause of hand, foot, and mouth disease (HFMD) in children. It causes fever, painful mouth sores (small ulcers on the tongue, gums, and inside of cheeks), and a blister-like rash on the hands, feet, and sometimes buttocks. It is extremely common in children under 5 and spreads easily in daycare settings. There is no specific treatment - it is a viral illness that resolves on its own within 7-10 days. The main concern is ensuring your child stays hydrated, as the mouth sores can make eating and drinking painful.

Why Does My Baby Keep Getting Sick at Daycare?

It is completely normal for babies and toddlers in daycare to get 8-12 viral illnesses per year, and it can feel like they are sick constantly. This happens because young children have immature immune systems and are being exposed to many viruses for the first time. Each cold builds immunity, and studies show that children who attend daycare early have fewer illnesses when they start school (the illness burden shifts - you get them at daycare age or school age, but either way the total exposure is similar). While the frequency of illness is normal, it can be exhausting for families.

Herpetic Gingivostomatitis (Mouth Sores) in Babies

Herpetic gingivostomatitis is a common first-time infection with the herpes simplex virus (HSV-1) that causes painful sores on the gums, tongue, lips, and inside the cheeks. It is most common in children between 6 months and 5 years. While the sores look alarming and can make eating very painful for several days, the infection resolves on its own within 7-14 days. The main concern is keeping your child hydrated while their mouth is sore.

Guide

When to Call the Doctor

General guide on when to call the pediatrician, visit urgent care, or go to the ER.

Frequently asked questions

Is hand, foot, and mouth disease - how long is it contagious normal?
Hand, foot, and mouth disease (HFMD) is most contagious during the first week of illness, particularly in the first few days when the child has a fever. However, the virus can be shed in stool for weeks after symptoms resolve. The incubation period is 3-5 days (time from exposure to symptom onset). Most daycare and school policies allow children to return once the fever is gone for 24 hours and they can participate in activities. You cannot fully prevent spread once a child is symptomatic, as they were most contagious before anyone knew they were sick.
When should I call the doctor about hand, foot, and mouth disease - how long is it contagious?
Your child with HFMD is showing signs of dehydration from refusing to drink High fever lasting more than 3 days Symptoms are worsening rather than improving after a week
When is hand, foot, and mouth disease - how long is it contagious normal?
Multiple family members getting sick 3-5 days apart (expected given the incubation period) The rash and blisters taking 7-10 days to fully resolve A second child in the family getting a milder case (still normal)
What causes hand, foot, and mouth disease - how long is it contagious?
Hand, foot, and mouth disease (HFMD) is most contagious during the first week of illness, particularly in the first few days when the child has a fever. However, the virus can be shed in stool for weeks after symptoms resolve. The incubation period is 3-5 days (time from exposure to symptom onset). Most daycare and school policies allow children to return once the fever is gone for 24 hours and they can participate in activities. You cannot fully prevent spread once a child is symptomatic, as they were most contagious before anyone knew they were sick. Common explanations include: Multiple family members getting sick 3-5 days apart (expected given the incubation period). The rash and blisters taking 7-10 days to fully resolve.
What should I mention to my pediatrician about hand, foot, and mouth disease - how long is it contagious?
You should mention hand, foot, and mouth disease - how long is it contagious at your next visit if: Your child keeps getting HFMD repeatedly. You are unsure when your child can return to daycare. An outbreak is happening at your daycare and you want prevention guidance.
Is hand, foot, and mouth disease - how long is it contagious normal at 0-12 months?
Babies are less likely to get HFMD because they have fewer contacts, but they can catch it from older siblings or at daycare. HFMD is spread through: close contact with an infected person, respiratory droplets from coughs and sneezes, fluid from blisters, and contact with stool (diaper changes). If an older sibling has HFMD, try to limit direct contact, wash hands thoroughly (especially after diaper changes), and clean shared surfaces. Unfortunately, the virus is hardest to contain because children are most contagious before symptoms appear.
Is hand, foot, and mouth disease - how long is it contagious normal at 1-3 years?
HFMD spreads rapidly in daycare settings. The contagion timeline: the child is contagious 1-2 days before symptoms appear, most contagious during the first week (especially while febrile), and continues shedding virus in stool for up to 4-6 weeks after recovery. Most daycares allow return once fever-free for 24 hours without medication and the child can eat and drink comfortably. Blisters do not need to be fully healed before returning. To reduce spread at home: frequent handwashing, clean and disinfect shared surfaces and toys, avoid sharing cups and utensils, and be diligent about hand hygiene after diaper changes.
Should I go to the ER for hand, foot, and mouth disease - how long is it contagious?
Seek emergency care if your child with HFMD is showing signs of dehydration from refusing to drink, or if high fever lasting more than 3 days. When in doubt, call your pediatrician's after-hours line for guidance.
Does hand, foot, and mouth disease - how long is it contagious go away on its own?
In many cases, hand, foot, and mouth disease - how long is it contagious resolves on its own, especially when multiple family members getting sick 3-5 days apart (expected given the incubation period).
CDCAAPNIH

References

  1. [1]Centers for Disease Control and Prevention. Hand, Foot, and Mouth Disease. CDC
  2. [2]American Academy of Pediatrics. Hand, Foot, and Mouth Disease. HealthyChildren.org. AAP
  3. [3]National Library of Medicine. Enterovirus Transmission. NIH

Doctor Visit Checklist

Bring this checklist to your next pediatrician visit to discuss Hand, Foot, and Mouth Disease - How Long Is It Contagious?.

Things to mention

  • Describe when you first noticed hand, foot, and mouth disease - how long is it contagious and how it has changed over time.
  • Note your baby's current age and which age-specific patterns you are seeing.
  • Mention if your child keeps getting HFMD repeatedly.
  • Mention if you are unsure when your child can return to daycare.
  • Let your doctor know if you have noticed any related concerns, such as changes in feeding, sleep, or movement patterns.
  • Bring a list of any questions or observations you want to discuss at the appointment.

Observations to share

  • Your child keeps getting HFMD repeatedly
  • You are unsure when your child can return to daycare
  • An outbreak is happening at your daycare and you want prevention guidance

Urgent signs to report immediately

  • Your child with HFMD is showing signs of dehydration from refusing to drink
  • High fever lasting more than 3 days
  • Symptoms are worsening rather than improving after a week

My notes

From ismybabyalright.com — free, evidence-based baby health guides

All content follows our editorial policy and is reviewed against published clinical guidelines.

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Related Resources

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Bottom line

Most cases of hand, foot, and mouth disease - how long is it contagious are normal. Talk to your pediatrician if your child with hfmd is showing signs of dehydration from refusing to drink.

Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.

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Hand, Foot, and Mouth Disease in Babies

Hand, foot, and mouth disease (HFMD) is a very common viral illness in babies and toddlers, especially during summer and fall. It causes small blisters or sores in the mouth and a spotted rash on the hands and feet. While it can make your child uncomfortable for a few days, it is not dangerous and resolves on its own within 7-10 days.

Coxsackie Virus (Hand, Foot, and Mouth Disease) in Baby

Coxsackie virus is the most common cause of hand, foot, and mouth disease (HFMD) in children. It causes fever, painful mouth sores (small ulcers on the tongue, gums, and inside of cheeks), and a blister-like rash on the hands, feet, and sometimes buttocks. It is extremely common in children under 5 and spreads easily in daycare settings. There is no specific treatment - it is a viral illness that resolves on its own within 7-10 days. The main concern is ensuring your child stays hydrated, as the mouth sores can make eating and drinking painful.

Why Does My Baby Keep Getting Sick at Daycare?

It is completely normal for babies and toddlers in daycare to get 8-12 viral illnesses per year, and it can feel like they are sick constantly. This happens because young children have immature immune systems and are being exposed to many viruses for the first time. Each cold builds immunity, and studies show that children who attend daycare early have fewer illnesses when they start school (the illness burden shifts - you get them at daycare age or school age, but either way the total exposure is similar). While the frequency of illness is normal, it can be exhausting for families.

Herpetic Gingivostomatitis (Mouth Sores) in Babies

Herpetic gingivostomatitis is a common first-time infection with the herpes simplex virus (HSV-1) that causes painful sores on the gums, tongue, lips, and inside the cheeks. It is most common in children between 6 months and 5 years. While the sores look alarming and can make eating very painful for several days, the infection resolves on its own within 7-14 days. The main concern is keeping your child hydrated while their mouth is sore.

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