Stomach acids break down the food we eat for digestion, and they also help the body absorb nutrients. The acid also eliminates bacteria in the stomach to prevent infection. However, when stomach acid backs up into the esophagus – which is the tube that connects the throat to the stomach – it can cause a burning sensation in the chest. This is called heartburn. This backup of stomach acid is referred to as acid reflux. This occurs when the sphincter at the base of the esophagus functions ... [Read More]