Acid reflux happens when acid from your stomach backs up into your esophagus, the tube that connects your throat and stomach. The acid causes a burning sensation in the middle of your chest and toward your throat. Mild acid reflux is commonly called heartburn. Besides the burning, you might also have these symptoms:
Regurgitation, a feeling like your stomach contents are backing up into your throat.
Chest pain.
Nausea.
Problems swallowing.
A hoarse voice.
A chronic cough.
Acid reflux symptoms can last for a few minutes or hours. They often feel worse at night when you lie down but they can happen anytime. Some symptoms, like chest pain or nausea, are similar to a heart attack. This can make it hard to tell the difference between heartburn and a heart attack. So if you’re having chest pain, call 911 just to be safe.