What are the first signs of HFMD?

Usually a mild fever and general fussiness or reduced appetite for a day or two, followed by small painful ulcers inside the mouth (on the tongue, gums or inside the cheeks) and a rash of small spots or blisters on the palms, soles of the feet, and often the buttocks or nappy area. The mouth ulcers are frequently what stops a child eating and drinking normally, which is usually more of a problem than the skin rash itself.

When should I take my child to a hospital?

Go to a hospital immediately if your child has a persistent high fever, seems unusually drowsy, floppy or hard to wake, is unusually irritable or inconsolable, has any jerking or twitching movements of the arms or legs, is struggling to breathe, or has stopped drinking and is not passing urine. These are established warning signs that a small minority of HFMD cases, particularly some enterovirus strains, can become severe, and they need urgent assessment rather than a wait-and-see approach.

Can a doctor come to our hotel or apartment to check my child?

Yes. A home visit in Da Nang typically arrives in 1 to 3 hours. The doctor examines your child, confirms whether it looks like HFMD or something else (such as a heat rash, insect bites, or a different viral illness), checks how well hydrated your child is, and talks you through home care and what to watch for — without a waiting room full of other unwell children.

How long is a child contagious?

A child is generally most contagious during the first week of illness, while the fever and mouth ulcers are at their worst. After that, the virus can still be shed in stool for several weeks even once your child looks and feels well again, which is why handwashing stays important long after the rash has faded. There is no single fixed cut-off date — treat it as a gradually declining risk rather than an exact number of days.

Can adults catch HFMD?

Yes, though it's less common and usually milder in adults, sometimes limited to mouth ulcers or a faint rash with little or no fever. Parents and caregivers in close contact with an infected child are the most likely adults to catch it. The same home care principles apply, and the same red flags — for anyone, not just children — mean it's time to see a doctor.

Hand, Foot & Mouth Disease in Da Nang: A Parent's Guide

What Hand, Foot and Mouth Disease Looks Like

Hand, foot and mouth disease is a viral illness caused by a group of common childhood viruses (most often coxsackievirus or enterovirus). It is one of the most familiar illnesses in Vietnamese daycare and kindergarten life, and it circulates year-round with seasonal surges — so it isn't unusual for a family travelling or living in Da Nang to run into it, whether your child picked it up locally or brought it from home.

The illness usually starts unremarkably: a mild-to-moderate fever, a bit of a sore throat, and a child who's more clingy or off their food than usual. That part alone looks like a dozen other childhood viruses, which is why parents often don't clock what's coming. A day or two later, the more recognisable signs show up:

Mouth ulcers. Small, painful sores appear on the tongue, gums, or inside the cheeks. These are usually the biggest source of distress — they make eating and drinking uncomfortable, which is often the reason a child seems miserable and off their food.
A rash on the hands and feet. Small red spots or fluid-filled blisters appear on the palms of the hands and soles of the feet — hence the name. It's usually not particularly itchy.
A rash on the bottom or nappy area. Common in younger children, sometimes mistaken for nappy rash or a heat rash if you don't know to look for the other signs alongside it.

Not every child gets the full textbook picture — some have only mouth ulcers, some have only a mild rash with barely any fever. The combination of fever followed by mouth ulcers and a hand/foot/bottom rash together is what makes HFMD reasonably easy to recognise once you know the pattern.

How It Spreads

HFMD spreads through close contact — respiratory droplets from coughing and sneezing, contact with fluid from the blisters, and contact with stool (which is why it spreads so efficiently among children who aren't yet reliably washing their hands after the toilet or before eating). Shared toys, doorknobs, and surfaces at daycare are classic transmission routes, and it spreads readily in group settings where young children play closely together.

This is exactly why it's relevant to expat families and travelling parents in Da Nang: daycare and kindergarten settings, swimming pools, and playgroups where children are in close contact are all plausible places for a child to pick it up, whether that's a local nursery, a hotel kids' club, or simply playing with other children at the beach or pool. It isn't a sign of anything being unhygienic — it's just how a very common, very contagious childhood virus behaves anywhere in the world, and Vietnam is no exception.

Home Care That Actually Helps

For the large majority of children, HFMD is uncomfortable but self-limiting — your job as a parent is to keep them comfortable and hydrated while their own immune system clears the virus over the following days. A few things genuinely help:

Fluids, fluids, fluids. Painful mouth ulcers make children reluctant to drink, and dehydration is the main practical risk with an otherwise mild case. Offer small sips often rather than large amounts at once — cool water, milk, or oral rehydration solution all count.
Soft, cold foods. Ice cream, yoghurt, cold soft fruit, and chilled purees are easier to get down than anything hot, spicy, acidic, or crunchy, all of which sting mouth ulcers. Don't worry if solid food intake drops for a few days — fluids matter more in the short term.
Paracetamol for fever and discomfort. A standard paracetamol-based fever and pain reliever, dosed appropriately for your child's weight and age (check the product packaging or ask your doctor — we won't give a specific dose here), can make a real difference to both the fever and the mouth pain, which in turn helps a child drink more comfortably.
Rest and normal comfort measures. There's no special cream or treatment that clears HFMD faster — the blisters and ulcers heal on their own over roughly a week to ten days in most children.

Avoid acidic drinks like orange juice, which sting mouth ulcers, and avoid sharing cups, cutlery, or towels with siblings while your child is unwell, simply to reduce the chance of spreading it around the family.

⚠️ Red Flags — Go to Hospital Immediately

Most HFMD is mild, but a small minority of cases — particularly with some enterovirus strains — can become severe. These are established warning signs in children with HFMD that mean urgent hospital assessment, not a wait-and-see approach:

Persistent high fever that isn't settling
Unusual drowsiness, or a child who's unusually difficult to wake or rouse
Unusual irritability or an inconsolable, high-pitched cry
Jerking or twitching movements of the arms or legs (myoclonus)
Trouble breathing, or breathing that looks fast or laboured
Not drinking at all, or not passing urine for many hours

If you see any of these, go to a hospital immediately, or call 115 (Vietnam's ambulance number — operators rarely speak English, so ask hotel reception to call for you) if your child cannot be safely moved. Don't wait for a home visit to be arranged if these signs are present.

What a Home Visit Adds

For the more common, milder end of HFMD, a home doctor visit isn't strictly necessary — but plenty of parents, especially those travelling or living somewhere unfamiliar, understandably want a professional to look at their child rather than guessing from a phone search. A visit in Da Nang typically arrives within 1 to 3 hours and can offer real value even for a straightforward case:

Confirming the diagnosis. A rash and fever in a young child has several look-alikes — heat rash, insect bites, other viral rashes, or an allergic reaction. A doctor examining your child in person can tell you with confidence whether it fits the HFMD pattern or whether something else is going on that needs a different approach. If you're unsure how to tell a rash apart from a bite or sting in the meantime, our guide to bites, rashes and skin infections covers the common look-alikes.
A proper hydration assessment. The doctor checks how well your child is actually coping with reduced drinking — something that's genuinely hard to judge on your own when a toddler is refusing every cup you offer.
Parent coaching. Practical, hands-on guidance on comfort measures, what's normal to expect over the coming days, and exactly what to watch for, tailored to your child rather than a generic article.
Avoiding a waiting room full of other sick children. A hotel or apartment visit means your unwell child — and any siblings — aren't sitting in a crowded clinic waiting area, which is both more comfortable for them and reduces the chance of spreading HFMD further or picking up something else while you wait.

If fever is the main thing you're trying to make sense of, our broader guide to a child's fever in Vietnam covers general fever assessment alongside this HFMD-specific picture.

Adults Can Catch It Too

It's not just a children's illness — adults, including parents and caregivers who spend a lot of close time with an infected child, can catch HFMD as well. It's less common in adults than in young children, and when it does happen it's usually milder, sometimes showing up as little more than a few mouth ulcers or a faint rash with a low-grade fever or none at all. That said, the same home care advice applies (fluids, comfort measures, paracetamol for discomfort), and the same red-flag principle holds: if an adult in the household develops a genuinely high fever, severe symptoms, or anything that feels seriously wrong rather than mildly uncomfortable, it's always worth a doctor's assessment rather than assuming it's "just the kids' bug."

Prevention: Handwashing and Cleaning Up After Play

HFMD is hard to prevent entirely once it's circulating in a daycare or playgroup — that's simply how contagious it is among young children. A few practical habits reduce the risk without turning your trip into a hygiene ordeal:

Handwashing, often and properly — for children and adults, especially after nappy changes and toilet use, and before eating. This is the single most effective everyday measure against HFMD.
Cleaning shared toys and surfaces regularly, particularly in group settings like daycare, kids' clubs, or shared play areas.
Keeping an unwell child home from daycare or group activities while they have symptoms, both for their own comfort and to limit spread to other children.
Not sharing cups, cutlery or towels within the household while someone is symptomatic.

None of this guarantees your child won't catch it — HFMD is simply a normal, common part of early childhood almost everywhere, Vietnam included — but it meaningfully lowers the odds and slows the spread if it does show up in your household.

For general guidance on deciding when any illness in Da Nang needs a doctor versus a hospital, see our guide to being sick in Da Nang, or browse all our health guides for travellers and families in Vietnam.

Hand, Foot and Mouth Disease in Vietnam: What Parents Need to Know