Many babies will have difficulty falling or staying asleep during their first year of life. A baby begins to adapt to the normal night–day cycle during the first month of life and it is perfectly normal that a baby will not have a full night of sleep before they reach 3 months of age.

“Newborns sleep for 3 to 4 hours at a time, night or day”

My baby won’t sleep – why?

In older babies, Cows’ Milk Allergy (CMA) may cause poor sleep/sleeping problems. So too can reflux. In newborns, gastro-oesophageal reflux disease (GORD), chronic diseases, or even feeding your baby too much food or drink at night may cause poor sleep/sleeping problems. In many babies, environmental factors, including excitement before bedtime and late napping in the afternoon, may also be responsible.

Could it be Cows’ Milk Allergy?

Poor sleep may be 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 poor sleep/sleeping problems, it may be CMA. You may have even noticed other symptoms (besides poor sleep/sleeping problems, such as vomiting, swelling, rashes, and inconsolable crying), which may affect other parts of your baby’s body.


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

This will allow you to select all the symptoms that your baby may have that may be cows’ 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. The information on this website should not replace medical advice from a medical professional.

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.