Vomiting in children: What’s normal and when should parents be concerned?
By Dr Rohan Malik
Paediatric gastroenterologist in Woolloongabba, Brisbane
Vomiting is one of the most common symptoms children experience. Whether it’s caused by a viral illness, motion sickness, or simply eating too much, most episodes are short-lived and settle without causing any lasting problems.
Whether it’s caused by a viral illness, motion sickness, or simply eating too much, most episodes are short-lived and settle without causing any lasting problems.
However, when vomiting is persistent, recurrent or associated with other concerning symptoms, it may be a sign that something more is going on.
Understanding the difference between normal vomiting and vomiting that needs further investigation can help parents know when to seek medical advice.
When is vomiting considered normal?
Occasional vomiting is a normal part of childhood.
Babies commonly bring up milk after feeds as their digestive system matures, while older children frequently vomit during viral gastroenteritis (gastro) or other common infections.
In most cases, children recover quickly, remain well hydrated and return to their usual selves within a few days.
When should parents be concerned?
Vomiting should be assessed if it:
- continues for an extended period
- keeps returning without an obvious cause
- is associated with poor weight gain or weight loss
- causes dehydration
- occurs alongside severe abdominal pain
- contains blood or green (bilious) fluid
- wakes a child from sleep or is accompanied by other worrying symptoms.
These features don’t necessarily mean there is a serious problem, but they do warrant medical assessment.
What could be causing ongoing vomiting?
Persistent or recurrent vomiting can have many different causes, including:
- gastro-oesophageal reflux
- food-related conditions
- Coeliac Disease
- Eosinophilic GI disorders
- disorders of gut-brain interaction
- delayed stomach emptying (gastroparesis)
- other gastrointestinal conditions.
- Sometimes the cause is straightforward, while in other cases further investigation is needed to reach a diagnosis.
It’s not always a stomach problem
Although vomiting often points to a digestive issue, that’s not always the case.
Children may also vomit because of migraines, certain infections, medications or conditions affecting other parts of the body. This is why it’s important to consider the whole clinical picture rather than focusing on vomiting alone.
How is persistent vomiting investigated?
Assessment begins with a detailed history and physical examination.
Understanding when vomiting occurs, what it looks like, whether it is related to meals and whether other symptoms are present can provide important clues to the underlying cause.
Depending on the child’s age and symptoms, further investigations may include blood tests, imaging or endoscopy.
Finding the cause is the first step
Most vomiting in children is temporary and improves without specific treatment. However, persistent or recurrent vomiting should not simply be accepted as normal, particularly if it is affecting a child’s growth, nutrition or quality of life.
A careful assessment can help identify the underlying cause and ensure children receive the most appropriate treatment, allowing them to get back to eating, growing and enjoying everyday life.
