Definition

Heartburn is a burning sensation in the retrosternal area, most commonly experienced in the postprandial period.1

Heartburn is considered troublesome if symptoms occur two or more days a week.

 

Reference

 
1. Vakil N, van Zanten SV, Kahrilas P, Dent J, Jones R, Global Consensus Group  The Montreal definition and classification of gastroesophageal reflux disease: a global evidence-based consensus. Am J Gastroenterol. 2006;101(8):1900.