Vomiting is the involuntary ejection of the stomach contents. An episode of vomiting will generally resolve by itself 6 to 24 hours after it starts. So most babies shouldn't need any particular medical treatment, however it is important to ensure that they receive plenty of fluid during this time to avoid dehydration.

A food allergy such as Cow’s Milk Protein Allergy (CMPA) may also be responsible for your baby’s vomiting. Almost 50% of babies with CMPA experience vomiting as a symptom.

Mother cleaning her baby's mouth after vomiting

Vomiting & CMPA

Why is my baby vomiting?

During your baby’s first few months of life (0-3 months or newborn stage), they may vomit occasionally – this is perfectly normal, although it may be worrying for parents. It may be caused by minor feeding problems such as eating too much, or be caused by an infection. If your baby suddenly starts vomiting it is likely to be caused by a stomach infection also known as gastroenteritis.

Could my baby have Cow’s Milk Protein Allergy?

Vomiting is a common symptom in with CMPA. However, babies with CMPA usually experience more than just one symptom and these symptoms can be very different from one baby to the next. Therefore it is always best to discuss it with your baby’s healthcare provider. They will look at the symptoms in detail and often use a symptom scoring system to decide if it is related to CMPA.

What to Do Next?

If you are worried that your baby has symptoms related to cow's milk, you should seek advice from your healthcare provider. Whilst you are preparing to visit your healthcare provider, it can be a good idea to record your baby's symptoms over a few days before the visit.

CMPA's diagnostic path.


Understand more about the steps towards 
a possible diagnosis of CMPA

CMPA Diagnosis Arrow

Overview of Symptoms

Respiratory icon


Up to 30% of infants with CMPA have respiratory symptoms

Anaphylaxis icon


Anaphylactic shock is a severe, immediate, allergic reaction, which can affect many parts of the body

Skin icon


Up to 75% of infants with CMPA can have skin-related symptoms