It is found that chewing sugarless gum can help to relieve heartburn. Heartburn happens when acidic digestive fluids travel from the stomach to the esophagus making your chest feel like it's on fire. Gum works by lowering the acidity in the throat and stimulating the production of saliva. Saliva is alkaline, so it helps to neutralize the acid in the esophagus. Also when you swallow saliva, it helps to wash and cleanse the esophagus of everything, including acid.