Heartburn specifically affects the esophagus and the stomach. The esophagus is a tube that delivers food into the stomach. It has a valve that opens and closes, allowing food into the stomach, while keeping it down during digestion. This valve can become overwhelmed by too much food or too much acid. This condition causes stomach ...

Heartburn specifically affects the esophagus and the stomach. The esophagus is a tube that delivers food into the stomach. It has a valve that opens and closes, allowing food into the stomach, while keeping it down during digestion. This valve can become overwhelmed by too much food or too much acid. This condition causes stomach ...