Reflux occurs when food backs up (refluxes) from the stomach. A regularly seen symptom of reflux is that the baby brings up milk, or solids, during or shortly after feeding.
Reflux is a common complaint with babies. Reflux is caused in infants by an insufficiently mature ring of muscle between the oesophagus and the stomach. This ring of muscle develops during the first year of life and in most cases the symptoms will decrease or disappear.