What are the symtoms of heartburn?

Burning. Heartburn is a burning sensation in the middle of the chest, just behind the sternum, that may radiate up into the neck. Heartburn is most commonly associated with gastric reflux but it also may be a sign of a more serious condition like ischemic heart disease (reduced oxygen supply to the heart muscle) or esophageal cancer.
Heartburn. Burning pain that may be felt in chest, abdomen or throat that may last minutes to hours. Pain can ^ right after eating, lying down or bending over. It may feel like food is stuck in the throat or chest & swallowing may be more difficult. Bitter/ sour/ hot may taste can back up into your mouth or throat. It may cause a sore throat, cough or hoarseness.