Feeding
Reflux, spitting up and when it is a problem
Almost all babies bring up milk, very few need medication, and prescribing has run well ahead of the evidence.
Bringing up milk is one of the most common reasons for infant consultations, and one of the areas where the gap between what is prescribed and what the evidence supports is widest.
What is normal
The muscle at the top of the stomach is immature in infants, the stomach is small, babies take large volumes relative to their size, and they spend a lot of time lying down.
Which is why a majority of babies bring up milk regularly, particularly in the first months, and why it peaks around four months and largely resolves by around a year as they sit, stand and take solids.
A baby who brings up milk frequently but is thriving, feeding well and not distressed is a happy spitter, and the problem is laundry rather than medicine.
When it is gastro-oesophageal reflux disease
The distinction that matters.
Reflux becomes a disease when it causes troublesome symptoms or complications.
Features suggesting this: poor weight gain, feed refusal or distress during feeds, back arching, persistent unexplained crying with feeding, recurrent chest infections, and in older infants haematemesis.
Even then, most improves with conservative measures.
What to exclude
Symptoms that are not simple reflux.
Projectile vomiting after every feed in a baby of two to eight weeks, particularly a boy, with hunger afterwards and weight loss — which suggests pyloric stenosis and requires urgent assessment and surgery.
Green or bile-stained vomit, which is an emergency suggesting obstruction.
Blood in vomit or stool.
A swollen or tender abdomen.
Fever or an unwell baby.
Vomiting starting after six months or persisting beyond a year.
A bulging fontanelle or unusual drowsiness.
And features suggesting cow's milk protein allergy — eczema, blood or mucus in stools, chronic diarrhoea or constipation, poor growth — which is a common alternative explanation and responds to dietary management rather than acid suppression.
What actually helps
Conservative measures first, which are recommended before any medication.
Reviewing feeding: overfeeding is a common contributor, and in formula-fed babies checking volumes against expected intake frequently identifies it.
Smaller, more frequent feeds.
Reviewing latch and bottle flow, since air swallowing worsens symptoms.
Holding upright after feeds for a period.
Avoiding bouncing or tight nappies and waistbands immediately after feeds.
Thickened feeds or alginate preparations, which have some supporting evidence.
And time, which is what resolves the great majority.
What does not help
Where guidance is clear and practice frequently is not.
Proton pump inhibitors and other acid suppressants have repeatedly failed to outperform placebo for crying and irritability in infants without confirmed acid-related disease.
They also carry risks: several studies associate infant acid suppression with increased rates of gastrointestinal and respiratory infections, and with possible effects on bone and allergy risk.
Guidelines therefore recommend against using them for uncomplicated reflux or for crying alone.
Sleeping a baby on an incline or on their front or side is not recommended, because it conflicts with safe sleep guidance and because evidence does not support benefit — this is one of the clearest points where a reflux remedy would create a far larger risk.
Cot wedges and positioners are advised against for the same reason.
Cow's milk protein allergy
Worth a section because it is frequently the actual diagnosis.
It affects a small percentage of infants and presents with a combination of gut, skin and sometimes respiratory symptoms.
Non-IgE mediated forms cause delayed symptoms and are harder to recognise: reflux-like symptoms, colic, blood or mucus in stools, eczema, and altered stools.
Diagnosis is by exclusion and planned reintroduction, under medical guidance.
Management is an extensively hydrolysed formula for formula-fed infants, or maternal dairy exclusion with dietetic support for breastfed infants.
Most children outgrow it within the first few years, which is why planned reintroduction matters rather than indefinite avoidance.
Practical management
For the family living with a baby who brings up a lot of milk.
Muslins everywhere, and accept the laundry.
Feed in a slightly more upright position.
Wind during and after feeds.
Keep a record of volumes, symptoms and weight, which is what a clinician actually needs to assess it.
And weigh regularly, since weight gain is the single most reassuring measure and its absence is the thing that changes the assessment.
General information only, not medical advice. Seek urgent care for green vomit, projectile vomiting, blood in vomit or an unwell baby, and consult a clinician before any medication.
