Heartburn, often called acid reflux, occurs when small amounts of acid from the stomach leak up into the oesophagus (food pipe). The symptoms are a burning sensation in the chest, an unpleasant sour taste in the mouth, bloating or nausea, and sometimes a cough or a hoarse voice.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/what-to-eat-and-avoid-for-heartburn