Gastric reflux is a common health condition here in North America with 18 to 28 per cent of people suffering from it (El-Serag 2014). Gastric reflux occurs when stomach acid splashes up from the stomach into the esophagus (food pipe)
http://thechronicleherald.ca/southshorebreaker/1424051-feeling-the-burn-%E2%80%94-gastric-reflux-may-be-felt-in-many-different-ways
Feeling the burn — gastric reflux may be felt in many different ways