Reflux in babies

Also called Infant reflux, Gastro-oesophageal reflux in babies, or Possetting

Reflux is when a baby brings milk back up during or shortly after feeding. It is very common and usually starts before 8 weeks. It happens because the muscle at the bottom of the food pipe is not fully developed, so milk can come back up easily. Most babies grow out of it by the time they are 1.

Last updated Nov 9, 2026

What it is

Most babies with reflux are healthy and gain weight well, and no treatment is needed.

Smaller, more frequent feeds, burping often and holding the baby upright after feeds can help. If symptoms are severe or the baby is not gaining weight, medicines or a change of formula may be offered.

Common signs

  • Bringing up milk during or after feeds
  • Coughing or hiccupping when feeding
  • Being unsettled during feeding
  • Swallowing or gulping after burping
  • Crying and not settling

How it is usually diagnosed

  • Questions about feeding and symptoms
  • Checking the baby's weight and growth
  • Rarely, other tests if symptoms are severe

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Growth and weight charts
  • Health visitor or GP notes
  • Paediatric letters
  • Prescriptions

Questions to ask your doctor

  • Is my baby gaining enough weight?
  • Could this be a milk allergy?
  • What changes to feeding should I try?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Green or yellow vomit, blood in vomit or poo, projectile vomiting, or a baby who is floppy or has breathing problems: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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