a painful burning sensation in the chest caused by gastroesophageal reflux (backflow from the stomach irritating the esophagus); symptomatic of an ulcer or a diaphragmatic hernia or other disorder
"After eating that spicy meal, I felt a sharp heartburn rising up my throat that made me worry about having developed an ulcer."
A burning pain in the chest that is caused by stomach acid entering the gullet.
"After eating that spicy meal, I sat on the edge of my bed to wait for the heartburn to subside before taking an antacid."