Hand, Foot, and Mouth Disease in Babies
Medically reviewed by Dr. Sarah Chen, MD, FAAP · Board-Certified Pediatrician
Content reviewed against published AAP, CDC, CDC guidelines
Last reviewed:
Baby skin is sensitive and changes frequently. If you are noticing hand, foot, and mouth disease in babies, here is what you need to know.
The short answer
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.
Key takeaways
- 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.
- Usually normal when: Low-grade fever (under 101.5F / 38.6C) lasting 1-3 days at the start of the illness
- Call your doctor if: Your baby shows signs of dehydration: no wet diapers for 6+ hours, no tears when crying, sunken fontanelle, or dry mouth
- Varies by age — see the age-by-age breakdown below
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What Parents Should Know
According to AAP, CDC guidelines, 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. At 0-6 months, hFMD is less common in very young infants, but when it occurs, it can cause more discomfort because babies cannot tell you about mouth pain. Watch for fussiness, drooling, and refusal to feed, which are clues that mouth sores may be present. Keep your baby well hydrated with breast milk or formula. Contact your pediatrician if your young infant develops this illness. It is generally considered normal when low-grade fever (under 101.5F / 38.6C) lasting 1-3 days at the start of the illness. However, you should contact your pediatrician promptly if your baby shows signs of dehydration: no wet diapers for 6+ hours, no tears when crying, sunken fontanelle, or dry mouth.
Normal vs. Concerning
By Age
What to expect by age
0-6 months
HFMD is less common in very young infants, but when it occurs, it can cause more discomfort because babies cannot tell you about mouth pain. Watch for fussiness, drooling, and refusal to feed, which are clues that mouth sores may be present. Keep your baby well hydrated with breast milk or formula. Contact your pediatrician if your young infant develops this illness.
6-12 months
This is a common age for HFMD, particularly in babies who attend daycare. The illness usually starts with a mild fever for 1-2 days, followed by small red spots or blisters on the palms, soles, and inside the mouth. The mouth sores can be quite painful, so your baby may refuse to eat or drink. Cool liquids, cold foods, and pain relief with infant acetaminophen can help.
1-3 years
Toddlers are the age group most commonly affected by HFMD. The rash may also appear on the buttocks, knees, and elbows. Some children develop a more widespread rash. A notable late effect is nail changes, where fingernails or toenails may peel or shed 4-8 weeks after the illness. This is harmless and the nails grow back normally.
What to Tell Your Pediatrician
- Describe when you first noticed hand, foot, and mouth disease in babies and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby is drinking significantly less than usual and you are worried about dehydration.
- Mention if fever persists beyond 3 days or exceeds 102F (38.9C).
- Bring a list of any questions or observations you want to discuss at the appointment.
What Should You Do?
When to take action
- Low-grade fever (under 101.5F / 38.6C) lasting 1-3 days at the start of the illness
- Small red spots or blisters on the palms, soles of the feet, and inside the mouth
- Fussiness and decreased appetite due to mouth discomfort for 3-5 days
- Mild rash on the buttocks, legs, or arms without blisters
- Nail peeling or shedding 4-8 weeks after recovery, which is a common harmless aftereffect
- Your baby is drinking significantly less than usual and you are worried about dehydration
- Fever persists beyond 3 days or exceeds 102F (38.9C)
- The rash is widespread, very blistered, or appears different than typical HFMD descriptions
- Your baby seems excessively sleepy or irritable beyond what you would expect
- Your baby shows signs of dehydration: no wet diapers for 6+ hours, no tears when crying, sunken fontanelle, or dry mouth
- Your baby develops a stiff neck, severe headache-like behavior (screaming when moved), or persistent vomiting, which could indicate viral meningitis, a rare complication
- Your baby under 3 months develops a fever with this illness
What You Can Do at Home
- Keep track of when you notice hand, foot, and mouth disease in babies — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that low-grade fever (under 101.5F / 38.6C) lasting 1-3 days at the start of the illness — this is generally within the range of normal.
- At 0-6 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Use fragrance-free, hypoallergenic products on your baby's skin. Avoid over-bathing — 2-3 baths per week is usually sufficient.
- While monitoring at home, seek immediate care if your baby shows signs of dehydration: no wet diapers for 6+ hours, no tears when crying, sunken fontanelle, or dry mouth.
Related Resources
Rash Decision Tree
Identify common rashes and determine when to seek care.
Baby Skin Conditions Guide
Visual guide to common baby skin conditions, rashes, and when to see a doctor.
Month-by-Month Development
Detailed monthly development guides from birth through 24 months.
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 in babies normal?
When should I call the doctor about hand, foot, and mouth disease in babies?
When is hand, foot, and mouth disease in babies normal?
What causes hand, foot, and mouth disease in babies?
What should I mention to my pediatrician about hand, foot, and mouth disease in babies?
Is hand, foot, and mouth disease in babies normal at 0-6 months?
Is hand, foot, and mouth disease in babies normal at 6-12 months?
Should I go to the ER for hand, foot, and mouth disease in babies?
Does hand, foot, and mouth disease in babies go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss Hand, Foot, and Mouth Disease in Babies.
Things to mention
- Describe when you first noticed hand, foot, and mouth disease in babies and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby is drinking significantly less than usual and you are worried about dehydration.
- Mention if fever persists beyond 3 days or exceeds 102F (38.9C).
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- Your baby is drinking significantly less than usual and you are worried about dehydration
- Fever persists beyond 3 days or exceeds 102F (38.9C)
- The rash is widespread, very blistered, or appears different than typical HFMD descriptions
Urgent signs to report immediately
- Your baby shows signs of dehydration: no wet diapers for 6+ hours, no tears when crying, sunken fontanelle, or dry mouth
- Your baby develops a stiff neck, severe headache-like behavior (screaming when moved), or persistent vomiting, which could indicate viral meningitis, a rare complication
- Your baby under 3 months develops a fever with this illness
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
Related Resources
Bottom line
Most cases of hand, foot, and mouth disease in babies are normal. Talk to your pediatrician if your baby shows signs of dehydration: no wet diapers for 6+ hours, no tears when crying, sunken fontanelle, or dry mouth.
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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