When you feel a burning pain or heartburn at the level of your lower chest, it is an acid reflux. The latter arises as the flow of stomach acid retreats to the food pipe. This is due to the lower oesophageal sphincter that does not shut down.
The doctor can diagnose the disease when acid reflux happens more than once a week. 50 to 70 percent of the population suffers from gastro-oesophageal reflux disease or GERD worldwide. Serious complications can be the result of a persistent burning pain.