Hand, Foot and Mouth Disease - Symptoms, Causes & Treatment
By ScanSkinAI Editorial Team✓ Reviewed for medical safetyLast updated June 2026
A mild, contagious viral infection common in young children. It causes sores in the mouth and a rash on the hands and feet. It's caused by coxsackievirus and typically clears up on its own within a week.
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Quick Answer
Hand, foot, and mouth disease is a mild but highly contagious viral infection that usually affects young children under five. It typically starts with a fever and a sore throat, followed by painful sores in the mouth and a blister-like rash on the hands, feet, and sometimes the buttocks. Because it is caused by a virus, usually coxsackievirus, it clears up on its own within a week to ten days. Treatment focuses on keeping your child comfortable and hydrated while the illness runs its course.
Clinical Context
Hand, foot, and mouth disease (HFMD) is one of the most common viral exanthems in children under 5 years. It's caused primarily by coxsackievirus A16 and enterovirus 71 (which can cause more severe disease). Outbreaks are common in childcare settings, especially in summer and fall. The disease is typically mild and self-limiting, but complications can rarely occur.
Symptoms
- Fever
- Sore throat
- Painful mouth sores (herpangina)
- Rash on hands and feet (may blister)
- Loss of appetite
- Irritability in children
- Rash may also affect buttocks and legs
Severity & Progression
Causes & Risk Factors
- Coxsackievirus A16 (most common)
- Enterovirus 71 (can cause severe disease)
- Spread through saliva, blister fluid, feces
- Close personal contact
- Respiratory droplets
Treatment & Management
HFMD is a self-limiting viral illness with no specific antiviral treatment. Management focuses on symptom relief: acetaminophen or ibuprofen for fever and pain, cold foods and fluids to soothe mouth sores, and ensuring adequate hydration. Topical anesthetics (magic mouthwash) may help with mouth pain. Most cases resolve within 7-10 days.
- Pain relievers (acetaminophen, ibuprofen)
- Cold foods and drinks
- Topical anesthetics for mouth sores
- Rest and fluids
- Usually resolves in 7-10 days
Red Flags & Complications
Seek medical attention if you experience any of the following:
- Dehydration from refusing to drink
- Nail shedding weeks later
- Rare: viral meningitis, encephalitis (especially EV71)
Self-Care Tips
- Offer cold fluids (popsicles, ice chips)
- Avoid acidic or spicy foods
- Ensure adequate fluid intake
- Monitor for signs of dehydration
- Keep child home until fever-free and mouth sores healed
When to See a Doctor
If child can't drink, symptoms don't improve after 10 days, or if there are signs of dehydration, neck stiffness, or unusual drowsiness
Frequently Asked Questions
How do I know if my child has hand, foot, and mouth disease?
The earliest signs are often a low fever, fussiness, and a sore throat. A day or two later, you might notice painful red spots or blisters inside the mouth, making it hard for your child to eat or drink. Shortly after, a rash typically appears on the palms of the hands, the soles of the feet, and sometimes the legs or buttocks.
How long is my child contagious, and when can they go back to daycare?
Children are most contagious during the first week of the illness. You should generally keep your child home until they have been completely fever-free for at least 24 hours without medication, and until all the mouth sores and skin blisters have healed. Note that the virus can still be shed in stool for several weeks, so strict handwashing is essential.
What is the best way to treat the blisters and mouth sores?
There is no specific cure, so treatment focuses on relief. You can give over-the-counter pain relievers like acetaminophen or ibuprofen to ease discomfort and reduce fever. Offer plenty of cold fluids, ice chips, or popsicles to soothe mouth pain and prevent dehydration. Avoid acidic or spicy foods, like citrus fruits, which can sting the mouth sores.
Can adults catch hand, foot, and mouth disease from their kids?
Yes, adults can catch it, though it is much less common. When adults do get infected, they often experience very mild symptoms or no symptoms at all. However, some adults can develop the full rash and mouth sores. Because it spreads through close contact, saliva, and blister fluid, frequent handwashing is the best way to protect yourself while caring for a sick child.
When should I take my child to the doctor for this?
You should consult a doctor if your child is refusing to drink fluids and shows signs of dehydration, such as perfectly dry diapers or not peeing for several hours. Also seek medical care if symptoms do not improve after ten days, if the fever is very high, or if your child seems unusually drowsy, completely unresponsive, or has a stiff neck.
Is it true that my child's fingernails might fall off after having this?
Yes, it is a known but harmless complication. A few weeks after the infection clears, you might notice your child peeling or losing some fingernails or toenails. This shedding is temporary and happens because the virus temporarily interrupts the nail growth cycle. The nails will grow back completely normal on their own without any special treatment.
How can ScanSkinAI help me check my child's rash?
ScanSkinAI can act as a screening aid by analyzing images of the rash on your child's hands or feet and comparing them to a database of common childhood skin conditions. However, the AI cannot provide a definitive diagnosis. Because hand, foot, and mouth disease has distinct symptoms like fever and mouth sores, you should always consult a healthcare provider for a thorough medical evaluation.
What can I do to stop the virus from spreading through our household?
The infection spreads through saliva, nasal mucus, blister fluid, and feces. The most effective prevention is frequent, thorough handwashing with soap and water, especially after changing diapers or helping a child use the toilet. Disinfect commonly touched surfaces and everyday toys. Teach children to cover their mouths when coughing and avoid sharing cups or eating utensils during outbreaks.
Related Conditions
Medical References
Information on this page is sourced from and verified against reputable medical resources:
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Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. The content on this page should not be used to diagnose or treat any health problem. Always consult with a qualified healthcare professional for proper medical evaluation, diagnosis, and treatment of your condition.