Our website does not support this browser  


Diarrhoea is the passing of three or more loose or liquid stools per day, lasting up to two weeks. It is more the change in stool consistency rather than stool number that is a sign of diarrhoea in a baby.

Healthy newborn stools are usually soft and loose. During the first few months, it may also be common for your baby to pass frequent stools which are yellowish in colour.

Why does my baby have diarrhoea?

Most diarrhoea in babies is short-lived. It is usually caused by a virus and may pass without the need for treatment. Other possible causes of your baby’s diarrhoea may include:

  • A food allergy such as Cow’s Milk Allergy (CMA)
  • A change in your baby's diet or a change in your diet (if you are breast-feeding)
  • If your baby is taking antibiotics or if you take antibiotics whilst breast-feeding

Could my baby have Cows' Milk Allergy?
Diarrhoea is a common symptom for babies with CMA. Babies with CMA usually experience more than just one symptom and these symptoms can be very different from one another.

If you think that your baby has diarrhoea , it may be CMA. You may have even noticed other symptoms (besides diarrhoea), which may affect other parts of your baby’s body.

Changing baby’s diaper
More than 1 in 2 infants with a cows' milk allergy will have diarrhoea as a symptom

For a simple and easy way to understand the symptoms associated with CMA, you can use our symptom checklist.

This will allow you to select all the symptoms that your baby may have that can be cow’s milk-related. You can then discuss these with your doctor.

In any case, if you have any doubts or concerns about your baby’s health, you should always seek advice from a medical professional as soon as possible.

SmilesBack App

Cows’ milk allergy (CMA) is a common food allergy in baby’s and young children but it is often challenging to diagnose and may take many months and doctors appointments. If you suspect that your baby might have cows’ milk allergy, you can use SmilesBack to help shorten the journey to diagnosis and help put smiles back where they belong.

SmilesBack is an easy-to-use app that has been developed with allergy experts and tested by parents. It enables you to easily record your baby’s symptoms and feeds and summarise them in a one-page, expert-designed report, to support your doctor before they make a diagnosis.



IMPORTANT NOTICE: Breastfeeding is the best form of nutrition for babies and provides many benefits to babies and mothers. It is important that, in preparation for and during breastfeeding, you eat a healthy, balanced diet. Combined breast and bottle feeding in the first weeks of life may reduce the supply of your own breastmilk, and reversing the decision not to breastfeed is difficult. Always consult your healthcare professional for advice about feeding your baby. The social and financial implications of using infant formula should be considered. Improper use of an infant formula or inappropriate foods or feeding methods may present a health hazard. If you use infant formula, you should follow the manufacturer’s instructions for use carefully – failure to follow the instructions may make your baby ill. Formula for special medical purposes intended for infants must be used under medical supervision.