Diarrhoea in babies and children
10-minute read
Key facts
- Diarrhoea is when your child has more frequent and loose bowel movements (poos).
- It’s usually caused by a virus.
- Medicines to reduce vomiting and diarrhoea are not recommended in young children.
- Babies under 6 months of age, with diarrhoea, are at higher risk of dehydration and should see a doctor.
- You can reduce the spread of infection by washing your hands, particularly before preparing food and after nappy changes.
What is diarrhoea in babies and children?
Diarrhoea is when your baby or young child has an increase in the amount of stool (poo) that they pass. Their poo is also more watery than normal.
in children is when they pass 3 or more loose or liquid stools (poos) per day.
What symptoms are related to diarrhoea in babies and children?
Severe dehydration is a medical emergency and can be fatal. If your baby shows signs of severe dehydration, seek urgent medical attention.
Diarrhoea is an increase in the frequency, and runniness of your child’s stools.
Your child may also have:
Learn how to tell if your child is sick.
What causes diarrhoea in babies and children?
Diarrhoea can be caused by an infection of your child’s . This is called gastroenteritis (a stomach bug or gastro).
Diarrhoea is usually caused by a virus, such as . But it can also be caused by:
- bacteria
- parasites
- a food intolerance
- a food allergy
How is the cause of diarrhoea in babies and children diagnosed?
Your doctor will ask about your child’s symptoms and may examine them. They may organise for your child to have:
When should my child see a doctor?
If your baby is under 6 months old and has diarrhoea, they need to be checked by a doctor.
You should take your child to the doctor if:
- there is lots of watery diarrhoea
- the amount of diarrhoea is increasing
- you can see blood in the diarrhoea
- they have a high
- they are difficult to wake
- they are refusing extra fluids
Your child should also see a doctor if:
- they vomit frequently and can't keep anything down
- the vomit is brown or green
- they have bad stomach pain
Babies under 6 months of age, with diarrhoea, should be checked by a doctor. This is because they are more likely to become dehydrated.
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How is diarrhoea in babies and children treated?
Young children with diarrhoea should be given fluids. This will not cure the diarrhoea, but it will prevent .
Self-care at home
Try to make sure your young . This helps to replace fluids lost due to diarrhoea. Drinking fluid stops your baby from becoming dehydrated.
Treatment for babies under 6 months of age
Babies under 6 months old who have diarrhoea should always be seen by a doctor.
Treatment for babies over 6 months of age
Treatment for babies aged over 6 months depends on how they usually feed.
Breastfed babies should continue to be breastfed but should be fed more often. An oral rehydration solution or water may be offered in addition to breastfeeds.
Formula-fed babies may need to have both an oral rehydration solution and their formula at normal strength.
Give your baby small amounts of fluids often. They can usually tolerate this better than a lot of fluids at once.
Oral rehydration fluids
Oral rehydration fluids are specially made to replace fluids and salts in the body. There are different types of oral rehydration fluids:
- powder or concentrated liquid that you mix with water
- tablets that you dissolve in water
- ice-blocks
- pre-made drinks
They also come in lots of different flavours. You can buy oral rehydration fluids at your local supermarket or pharmacy.
Drinks to avoid
Do not give your child:
- undiluted fruit juice or cordial
- fizzy drinks
- sports drinks
- energy drinks
These may make their diarrhoea worse.
Medicines for diarrhoea in babies and children
Most young children do not need to take medicine for diarrhoea. In fact, many medicines that stop diarrhoea can be harmful for babies and children.
Diarrhoea is often caused by viruses. So, your doctor will probably not give your child antibiotics. This is because viruses do not respond to antibiotics.
Talk with your doctor or pharmacist about how best to treat your child for diarrhoea.
Other treatment options
If your young child becomes very dehydrated, they may need to be given fluids in hospital through:
- a nasogastric tube (a tube from their nose into their stomach)
- an intravenous drip (IV) directly into a vein
Complications of diarrhoea in babies and children
Dehydration
Dehydration is the most common complication of diarrhoea in young children. Dehydration is more likely in children under 12 months of age and those with weak . You will know your baby is dehydrated if they:
- have dry lips and mouth
- have
- have fewer wet nappies
- have cold hands and feet
- are very sleepy
Nappy rash
You can help prevent nappy rash by:
- changing your baby’s nappy more often
- using a zinc-based cream on their bottom
This will stop the diarrhoea from burning your baby’s skin.
Can diarrhoea in babies and children be prevented?
You can often prevent diarrhoea by maintaining good standards of hygiene.
- Wash your hands after using the toilet, changing nappies and before preparing bottles or food.
- Check your after using the toilet and before eating.
- Clean and sterilise baby bottles carefully.
You should also make sure that you .
- Meat products should be cooked well.
- Raw meat and chicken should be stored in a covered container in the bottom of the fridge. This will stop the juices from the meat contaminating other food.
Your child shouldn’t until at least 24 hours after their last episode of diarrhoea.
´¡³Ü²õ³Ù°ù²¹±ô¾±²¹â€™s recommends that your baby is vaccinated against rotavirus infection. Your baby can get this vaccination at the ages of 2 and 4 months.
Resources and support
Your doctor or pharmacist can advise you on how to treat diarrhoea in your baby or young child.
The Royal Children’s Hospital Melbourne has in English and languages other than English.

Speak to a maternal child health nurse
Call ºÚÁϳԹÏ, Birth and Baby to speak to a maternal child health nurse on 1800 882 436 or video call. Available 7am to midnight (AET), 7 days a week.
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Last reviewed: February 2025