Gastro-oesophageal reflux occurs when contents from the stomach travel back into the gullet (oesophagus). This is a very common and harmless thing in newborn babies and infants and as the child grows and matures this will normally improve. Many parents will have experienced frequent positing in the early life of their baby and sometimes in children and adults, the stomach contents can come out of the mouth and be seen as vomiting but may not be abnormal or the result of gastro-oesophageal reflux. It is a naturally occurring event in all people but when it leads to complications it is called gastro-oesophageal reflux disease (GORD).