Diarrhoea in Children: Fluids, Food and When to See a Doctor

Most diarrhoea in children is a short-lived tummy infection, but the real risk is not the loose stools. It is dehydration, which can creep up quickly in a small child, especially in Singapore’s heat. This guide explains how to keep fluids going with oral rehydration, what to feed and what to hold back, how to stop the bug spreading through the household, and the warning signs that mean a doctor or a 995 call.

We are a maid agency, not a clinic, so everything here comes from KK Women’s and Children’s Hospital (KKH), HealthHub and the National Environment Agency (NEA), linked so you can check the wording.

Two points before anything else. HealthHub advises that a child under two years old with diarrhoea or vomiting should see a doctor, rather than being treated at home alone. And if your child is unresponsive, struggling to breathe or has blue or grey lips, call 995 immediately.

What is usually behind a stomach flu in children

Doctors call it gastroenteritis, an infection of the gut that causes frequent loose or watery stools, often with vomiting, fever or tummy pain. Many families call it a stomach flu. According to KKH’s guide to diarrhoea in childhood, most cases are viral, with rotavirus the most common cause, and bacteria such as salmonella are a less frequent culprit. KKH says it usually lasts two to four days and occasionally up to ten.

HealthHub’s page on gastroenteritis in children explains how it spreads: through close contact with an infected person, including their hands after using the toilet, through touching contaminated surfaces and objects, through food prepared by someone who is infected, and through contaminated food. That list is the blueprint for the hygiene section below.

Most children do not need medicine. KKH is clear that keeping the child well hydrated is the main treatment.

Hydration first: oral rehydration for diarrhoea in children

When a child has diarrhoea, they lose water and salts faster than usual. Plain water replaces water but not salts, which is why official guidance points to oral rehydration solution (ORS) for children over 12 months who are not vomiting.

For children over 12 months

1. Offer fluids before food. KKH advises stopping solids for a while and focusing on fluids. HealthHub agrees that fluids matter more than solid food when appetite is poor.
2. Use an oral rehydration solution. ORS from a pharmacy contains the salts a child is losing. Prepare it exactly as the pack or your pharmacist says. KKH notes it can be served cold, or frozen into ice sticks, which many children find easier to accept.
3. Know the alternatives. KKH lists rice water and barley water as alternatives, and fruit juice only if diluted, one cup of juice to four cups of water.
4. If your child is vomiting, go small and slow. KKH suggests 10 ml of clear fluid every 10 to 15 minutes for an hour. If that stays down, increase by 10 ml each following hour.
5. Bring back normal food gradually once the stools become less frequent and firmer.

For babies under 12 months

KKH’s advice for infants is to keep feeding. If your baby is breastfed, continue and feed more often. If your baby is formula fed, continue the formula. Do not give water only. Remember HealthHub’s advice that any child under two with diarrhoea or vomiting should be seen by a doctor, who can advise on rehydration for your baby specifically.

What to avoid

• Sugary drinks. HealthHub lists them among things to avoid.
• Undiluted fruit juice, for the same reason.
• Anti-diarrhoea medicines unless a doctor prescribes them. HealthHub warns that some are unsafe for young children, and KKH says medicines used to stop diarrhoea in adults are generally not used in children.

What to feed as your child recovers

Once vomiting settles, HealthHub advises a gradual return to normal eating. It suggests lean meats and complex carbohydrates such as rice and bread, and avoiding fatty, spicy or fried food and sugary drinks while the gut recovers.

Milk can be tricky for a few days. HealthHub explains that the intestines may temporarily struggle to digest lactose, so milk can worsen tummy ache and diarrhoea in some children. For babies, KKH says to keep breastfeeding and keep the usual formula; if diarrhoea goes on for a long time, talk to your doctor before changing formula.

In a Singapore kitchen that might mean plain rice or porridge, bread, and lean steamed chicken or fish, offered in small portions. Follow your child’s appetite rather than pushing a full plate.

Dehydration red flags, and when to see a doctor or call 995

Watch the child as closely as the nappy. Signs of dehydration listed by KKH and HealthHub include:

• a dry mouth, tongue or lips;
• crying without tears, or sunken eyes;
• passing much less urine, or no wet nappies or urine for 8 to 12 hours;
• tiredness, unusual sleepiness or being hard to rouse;
• dizziness in an older child;
• a faster heart rate or weight loss.

See a doctor if

HealthHub’s gastroenteritis guidance says to see a doctor if your child cannot keep down small amounts of fluid for more than six hours, shows signs of dehydration, is unusually sleepy or drowsy, has severe watery diarrhoea lasting more than three to four days, has blood, pus or thick mucus in the stools, has a persistently high fever for more than three days, caught the infection overseas, or is not improving after two days. KKH adds that persistent vomiting needs a doctor. And of course, if you are worried, go.

Go to the Children’s Emergency if

HealthHub’s guide to when to take your child to the ER says that if vomiting or diarrhoea does not ease within 24 hours, take your child in, and go sooner if there is blood or green bile in the vomit, or your child refuses all food or vomits everything. It also says a baby under three months old with a fever above 38°C needs immediate medical attention.

Call 995 if

Your child is unresponsive, having a seizure, has stopped breathing or is breathing with great difficulty, or has blue, purple or grey lips or skin, or is unusually pale and clammy.

Diarrhoea often comes with a fever. Our separate guide to fever in children covers temperature taking, comfort care and fever red flags in detail.

Stopping the bug spreading through the household

Tummy bugs travel fast in a flat where children, grandparents and a helper share a kitchen and bathroom. The guidance comes down to hands, food and surfaces.

Hands

• Everyone washes hands with soap and water after the toilet, after every nappy change and before preparing or eating food.
• Teach older children to wash properly, and supervise toddlers.

Food

• Because an infected person preparing food is one of the routes HealthHub names, anyone in the home with diarrhoea or vomiting, including your helper, should avoid cooking for others until they are well, wherever the household can arrange it.
• Cook meat and fish thoroughly and wash fruit and vegetables well.
• Sterilise baby bottles before each use, as both KKH and HealthHub advise.

Surfaces, toilets and laundry

NEA’s guidelines for cleaning and disinfecting residences give practical steps you can adapt:

1. Wear disposable gloves and a mask when cleaning up after vomiting or diarrhoea, and keep children out of the room.
2. Open windows so fresh air comes in during and after cleaning.
3. Clean the toilet, flush handle, taps, door handles and the nappy-changing area. For toilets, NEA describes diluting household bleach of 5.25 to 6% strength at one part bleach to nine parts water, leaving it for 10 minutes, then cleaning with detergent and water.
4. Put used cloths and gloves into double-lined plastic bags, seal them and throw them out with household rubbish.
5. Wash soiled clothes and bedding in hot water above 60°C with detergent, as NEA advises. Do not shake soiled linen.
6. Wash your hands thoroughly when you finish.

Safety warnings: never mix bleach with other cleaners, especially anything containing ammonia or acids such as some toilet and limescale cleaners, because the fumes are dangerous. Mix diluted bleach fresh, store bleach well out of children’s reach, and test on a hidden spot before using it on fabrics or delicate surfaces.

KKH also notes that rotavirus vaccination is available for young babies. Ask your paediatrician or polyclinic whether it suits your child.

A simple plan for your helper

When a child is sick during working hours, your helper is often the one tracking drinks and nappies. Our guide to childcare routines with a helper covers the bigger picture; for tummy bugs, agree on:

• A fluids and nappies log: what was offered, how much went down, every wet nappy, every loose stool and every vomit, with times.
• The ORS method: how to make it, how much to offer and how often, written out from the pack or your doctor.
• The red-flag list on the fridge, with clear permission to call 995 first and you second.
• Glove and handwashing routines, and safe bleach handling, including never mixing products.
• What happens if she gets sick too, so she can rest without worrying about the cooking.

If you are reviewing how your helper handles hygiene and cleaning more generally, our article on training simple routines for cleaning, childcare and cooking is a good starting point.

Related guides: Maid for Newborn Care Singapore: A Practical Hiring Guide and Nanny or Babysitter in Singapore? Why Families Pick a Helper.

Frequently Asked Questions

How long does diarrhoea in children usually last?

KKH says gastroenteritis in children usually lasts two to four days and occasionally up to ten. HealthHub advises seeing a doctor if your child is not improving after two days, if severe watery diarrhoea lasts more than three to four days, or at any point if there are signs of dehydration or blood in the stools.

Can I give my child plain water instead of ORS?

Water alone does not replace lost salts, so KKH recommends an oral rehydration solution for children over 12 months who are not vomiting, with rice or barley water as alternatives. For babies, keep up breast or formula feeds, not water only.

Should I stop milk when my child has a stomach flu?

For babies, KKH advises continuing breastfeeding and the usual formula. For older children, HealthHub notes that milk may temporarily worsen tummy ache and diarrhoea because the gut can struggle to digest lactose, so some families hold back on milk drinks for a few days and reintroduce them gradually.

Can I give anti-diarrhoea medicine to my child?

Not unless a doctor prescribes it. HealthHub warns that some anti-diarrhoea medicines are unsafe for young children, and KKH says medicines used to stop diarrhoea in adults are generally not used in children. Hydration is the main treatment.

When should my child go back to preschool?

Check your preschool’s own policy, as centres set their own rules for children returning after diarrhoea or vomiting. If you are unsure whether your child is well enough, ask your doctor.

Conclusion

Diarrhoea in a child is usually a short, unpleasant few days rather than a medical crisis, provided fluids keep pace. Small, frequent sips of an oral rehydration solution, continued breast or formula feeds for babies, plain food as appetite returns, and no anti-diarrhoea medicine without a doctor’s say-so are the core of the official advice.

Keep watching wet nappies, tears, alertness and whether drinks stay down, and keep handwashing and cleaning careful so the bug stops with one child. If the signs point the wrong way, or your child is under two, see a doctor, and call 995 in an emergency.

A helper who knows the plan makes sick days much easier on parents who are still at work. You can get in touch with the Femme5 team to discuss your family’s needs, read more about how we work with employers, or explore what a good placement looks like.

The Femme5 Team
Maid placement specialists, Femme5 Maid Agency
Our consultants work with Singaporean and expatriate families on helper matching, contracts and MOM compliance, and we verify the regulatory guidance in our articles directly against the Ministry of Manpower’s published requirements.