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Baby reflux
Category: Babies & Children · All children symptoms
What it can feel like
A baby bringing up a lot of milk (infant reflux) means milk returning effortlessly after feeds — possets, or larger amounts — because the valve at the top of the stomach is immature and the diet is liquid and horizontal. Some degree is normal in most babies and resolves as they sit up and wean; it becomes a problem when growth, comfort or breathing suffer.
Possible causes
A symptom can have many causes, and most are not serious. The lists below group conditions this symptom can be associated with — common causes first. They are possibilities to discuss with a clinician, not a diagnosis.
Common causes
Baby reflux can be associated with normal developmental immaturity of the stomach valve, large or fast feeds, swallowing air, and lying flat — peaking around four months and resolving by about a year in the great majority.
Other possible causes
Problematic reflux can be associated with gastro-oesophageal reflux disease (pain, arching, feed refusal, poor weight gain), cow's milk protein allergy (with eczema, blood-streaked stools or persistent crying), and rarely anatomical issues such as a hiatus hernia or pyloric stenosis when vomiting becomes forceful and projectile.
Red flags — when to seek help promptly
- Bringing up milk with poor weight gain or weight loss
- Forceful or projectile vomiting, or vomit that is green or blood-stained
- Feeding refusal, back-arching and inconsolable crying with feeds
- Blood in the stool, significant eczema or wheeze suggesting allergy
- Breathing pauses, colour change or choking episodes with feeds
- Signs of dehydration or a baby who is becoming sleepy and unresponsive
What a clinician may do
A clinician will chart growth (the decisive measure), observe feeding, and examine the baby. Thriving babies usually need only feeding-technique advice and time; faltering growth or pain patterns lead to allergy exclusion trials, feed thickeners, acid-suppression in selected cases, and paediatric referral.
Related guides on MedicalVideos.com
Frequently asked questions
My baby brings up milk after every feed — is that abnormal?
Probably not, if they are comfortable, growing along their curve and otherwise well — laundry problem, not medical problem is the classic summary. The volume looks bigger than it is: a tablespoon of milk spreads spectacularly. Growth and comfort, not the washing pile, decide.
When does reflux become 'disease'?
When it produces consequences: faltering growth, significant pain and feed aversion, blood in vomit or stool, or respiratory effects. That shift — from physiological reflux to reflux disease — is what moves management from reassurance and technique to investigation and treatment.
Related symptoms — Babies & Children
Browse the B section of the A–Z list or return to the Symptoms A–Z hub.