Common Childhood Illnesses in Singapore: HFMD, Dengue and When to See a Doctor

Living in a tropical climate with year-round warmth and humidity, Singapore presents a unique set of health challenges for young children. Two illnesses that every parent in Singapore should understand are Hand, Foot and Mouth Disease (HFMD) and Dengue Fever. Both are endemic to the region, and outbreaks occur with regularity — particularly during warmer months and the mid-year period.

This guide breaks down what every parent needs to know: how to spot the symptoms, what to do at home, and critically, when it is time to seek medical attention.

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Understanding Hand, Foot and Mouth Disease (HFMD)

Hand, Foot and Mouth Disease is one of the most common childhood infections in Singapore. It is caused by enteroviruses, most frequently Coxsackievirus A16 and Enterovirus 71 (EV71). Children under five are the most susceptible, and outbreaks frequently occur in childcare centres and preschools.

How HFMD Spreads

HFMD is highly contagious. It spreads through:

• Direct contact with nasal or throat secretions, saliva, and fluid from blisters
• Contaminated surfaces such as toys, doorknobs, and shared utensils
• Faecal-oral transmission, which is common in diaper-changing environments

The incubation period is typically three to five days. A child can be contagious even before symptoms appear, which makes containment in group settings difficult.

Recognising the Symptoms

The hallmark symptoms of HFMD include:

• Fever, often the first sign, usually mild to moderate
• Sore throat and mouth ulcers, which may cause refusal to eat or drink
• A rash or small blisters on the palms of the hands, soles of the feet, and sometimes the buttocks or knees
• General irritability and fatigue, especially in younger children

Most cases are mild and resolve on their own within seven to ten days. However, infections caused by EV71 can occasionally lead to serious neurological complications, including viral meningitis and encephalitis.

Managing HFMD at Home

There is no specific antiviral treatment for HFMD. Care is supportive:

• Keep your child hydrated. Offer cool water, milk, or ice pops. Avoid acidic drinks like orange juice, which can sting mouth ulcers.
• Use paracetamol (not aspirin) to manage fever and pain, following age-appropriate dosing.
• Serve soft, bland foods such as porridge, mashed potato, or cold yoghurt if mouth sores make eating painful.
• Maintain hand hygiene. Wash hands frequently with soap and water, especially after diaper changes.
• Isolate the child from siblings and other children. MOH guidelines require children to stay away from school or childcare until all blisters have dried and crusted over.

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Understanding Dengue Fever

Dengue is a mosquito-borne viral infection transmitted by the Aedes aegypti and Aedes albopictus mosquitoes. Singapore experiences dengue clusters throughout the year, with peaks typically between May and September. The National Environment Agency (NEA) regularly publishes dengue cluster maps that parents should monitor.

How Dengue Spreads

Unlike HFMD, dengue does not spread from person to person. It is transmitted exclusively through the bite of an infected Aedes mosquito, which is most active during dawn and dusk. These mosquitoes breed in stagnant water — even small collections in flower pot saucers, pails, or clogged roof gutters are sufficient.

Recognising the Symptoms in Children

Dengue symptoms in children can range from mild to severe. They typically appear four to seven days after a mosquito bite:

• High fever (often 39–40°C), which may come on suddenly
• Severe headache, particularly behind the eyes
• Body and joint aches — dengue is sometimes called "breakbone fever"
• Nausea, vomiting, or abdominal pain
• Skin rash, which may appear two to five days after the onset of fever
• Mild bleeding from the nose or gums
• Fatigue and loss of appetite

Young children may not be able to articulate these symptoms clearly, so parents should watch for lethargy, persistent crying, and refusal to eat or drink.

The Critical Phase

The most dangerous period in dengue is paradoxically when the fever breaks, usually around days three to seven. This is called the critical phase, during which plasma leakage, bleeding, and organ damage can occur. Warning signs include:

• Persistent vomiting
• Severe abdominal pain
• Bleeding from the gums or nose, or blood in vomit or stool
• Rapid breathing or difficulty breathing
• Cold, clammy skin or restlessness
• A sudden drop in platelet count

If any of these signs appear, seek emergency medical care immediately.

Managing Dengue at Home

For mild dengue managed at home under a doctor's guidance:

• Ensure adequate fluid intake — oral rehydration salts, water, and isotonic drinks
• Use paracetamol only for fever and pain. Avoid ibuprofen, aspirin, and NSAIDs, as these can worsen bleeding
• Monitor with daily blood tests as advised by the doctor to track platelet counts and haematocrit levels
• Rest is essential — keep your child comfortable and cool

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When to See a Doctor

Knowing when a childhood illness requires professional medical attention is one of the most important skills a parent can develop. Here are clear guidelines.

See a Doctor Promptly If Your Child Has:

• A fever lasting more than three days without improvement
• Refusal to drink fluids for more than a few hours, or signs of dehydration such as dry lips, sunken eyes, or reduced urination
• Difficulty breathing or unusually rapid breathing
• Excessive drowsiness or difficulty waking up
• A rash that spreads rapidly or is accompanied by high fever
• Severe headache or neck stiffness, which may indicate meningitis
• Persistent vomiting that prevents oral intake

Go to the Emergency Department If:

• Your child is unresponsive or confused
• There are signs of bleeding — blood in vomit, stool, or unusual bruising
• Your child has a seizure or convulsion
• Breathing becomes laboured or irregular
• Your child appears to be in severe pain that is not relieved by paracetamol

Special Considerations for Infants

Babies under three months with a fever of 38°C or above should always be seen by a doctor, regardless of other symptoms. Their immune systems are still developing, and infections can escalate rapidly.

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Prevention: Your First Line of Defence

Preventing HFMD

• Teach children to wash hands thoroughly and frequently
• Disinfect shared surfaces and toys regularly
• Keep sick children at home until they are fully recovered
• Avoid sharing utensils, towels, and cups

Preventing Dengue

• Eliminate mosquito breeding habitats. Do the Mozzie Wipeout — turn over pails, change water in vases, clear roof gutters, and cover water containers
• Use mosquito repellent containing DEET, picaridin, or IR3535 on exposed skin
• Dress children in long sleeves and pants when outdoors, especially at dawn and dusk
• Use mosquito nets for infants sleeping during the day
• Install or maintain window and door screens at home
• Check the NEA dengue cluster map regularly and take extra precautions if you live near an active cluster

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Building a Home First Aid Kit for Parents in Singapore

Every household with young children should maintain a basic kit:

• Digital thermometer
• Paracetamol syrup (age-appropriate dosage)
• Oral rehydration salts (ORS)
• Antiseptic cream for minor skin irritations
• Mosquito repellent (child-safe formulation)
• Calamine lotion for rashes and itch relief
• Saline nasal drops for congestion

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Frequently Asked Questions

Can my child get HFMD more than once?

Yes. There are multiple strains of enteroviruses that cause HFMD. Immunity to one strain does not protect against others, so reinfection is possible.

Is there a vaccine for HFMD or dengue?

There is currently no widely available vaccine for HFMD. For dengue, a vaccine (Dengvaxia) exists but is generally recommended only for individuals with prior confirmed dengue infection, due to the risk of more severe disease in dengue-naive individuals. Consult your paediatrician for the latest guidance.

How long should my child stay home with HFMD?

Follow MOH guidelines: children should remain at home until all blisters have dried up and crusted over, and they are fever-free. This is usually about seven to ten days from the onset of symptoms.

Can adults catch HFMD?

Yes, though it is less common. Adults who contract HFMD may experience milder symptoms but can still spread the virus to children.

Should I be worried about every mosquito bite?

Not every mosquito bite leads to dengue. However, if your child develops a high fever within a week of being bitten — especially if you live near a dengue cluster — see a doctor and request a dengue test.

When is dengue season in Singapore?

Dengue cases tend to peak between May and September, coinciding with warmer and wetter weather. However, cases occur year-round in Singapore's tropical climate, so vigilance should be constant.

My child's fever broke — does that mean they are recovering from dengue?

Not necessarily. The period when the fever subsides (days three to seven) is actually the critical phase of dengue. Continue monitoring closely and follow up with your doctor for blood tests even after the fever resolves.

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Final Thoughts

Childhood illnesses like HFMD and dengue are a reality of raising children in Singapore. While they can be alarming, most cases are manageable with prompt recognition, appropriate home care, and timely medical attention. Stay informed, maintain good hygiene practices, keep mosquitoes at bay, and trust your parental instincts — if something feels wrong, it is always better to see a doctor early than to wait and worry.