Diarrhea 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 baby diarrhea. Normal or healthy baby stools are soft and loose. During the first few months, your baby may also pass frequent stools which are yellowish in colour. This is also perfectly normal.

Why does my baby have diarrhea?

Most baby diarrhea is short-lived. It is usually caused by a virus and goes away without treatment. Other possible causes of your baby’s diarrhea include:

  • A food allergy such as Cow’s Milk Protein Allergy (CMPA)
  • 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
Baby Diarrhea
More than 1 in 2 infants with a cow’s milk allergy will have diarrhea as a symptom

Could my baby have Cow’s Milk Protein Allergy?

Diarrhea is a common symptom for babies with CMPA. Babies with CMPA usually experience more than just one symptom and these symptoms can be very different from one another.

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

For a simple and easy way to check common symptoms associated with CMPA, you can use our symptom checker

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.


IMPORTANT NOTICE: Mothers should be encouraged to continue breastfeeding even when their babies have cow’s milk protein allergy. This usually requires qualified dietary counseling to completely exclude all sources of cow’s milk protein from the mothers’ diet.If a decision to use a special formula intended for infants is taken, it is important to follow the instructions on the label. Unboiled water, unboiled bottles or incorrect dilution can make babies ill. Incorrect storage, handling, preparation and feeding can eventually lead to adverse effects on the health of babies.Formula for special medical purposes intended for infants must be used under medical supervision.

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