Heartburn is a symptom of acid reflux. It's a painful burning sensation in the middle of your chest caused by irritation to the lining of the esophagus caused by stomach acid. This burning can come on anytime but is often worse after eating.

How painful is acid reflux?

So, the acid in your esophagus causes a burning sensation in your chest. The pain can feel sharp, burning, or like a tightening sensation. Some people may describe heartburn as burning that moves up around the neck and throat or as discomfort that feels like it's located behind the breastbone.

Where do you feel reflux pain?

Heartburn is a symptom of many different conditions, including acid reflux and GERD. It typically feels like a burning in the center of your chest, behind your breastbone. Heartburn can last anywhere from a few minutes to a few hours.