Common infant GERD symptoms are:
Frequent spitting up or vomiting
Over half of all infants will spit up at some point during their first three months of life. Referred to as "happy spitters," they usually don't require treatment, and will usually outgrow this. For some infants, however, this spitting up, or reflux, is severe and requires treatment.
Irritability when feeding
This irritability includes whining, crying, screaming, and fussiness, which can last for varied amounts of time. This irritability can stem from the burning sensation and pain in the esophagus when formula and stomach acid is refluxed into the esophagus.
Refusing food or eating only small amounts
Infants may refuse to eat if pain occurs when they swallow. This pain can be caused by the irritation in the esophagus when formula and stomach contents are refluxed back up into the esophagus.
Arching the back while feeding
When babies are experiencing abdominal pain or discomfort, they will often arch their backs or draw up their legs.
When a baby has a "wet" burp, a small amount of liquid is regurgitated as he burps.
Hiccups can be triggered by the stimulation of nerves found in the upper part of the stomach or lower part of the esophagus. The vagus nerve, which runs from the brain to the abdomen, can become irritated. This irritation can come from stomach contents entering the esophagus.
A frequent cough may occur if refluxed stomach acid is aspirated, irritating the airways, or when the stomach acid irritates the throat.
Poor sleep habits with frequent waking
When an infant is sleeping and his or her head isn't elevated, this allows stomach contents to press against the lower esophageal sphincter (LES), and can cause it to open inappropriately. When stomach contents are refluxed into the esophagus, it can cause coughing and a choking sensation, which in turn can make sleeping more difficult.