Acid reflux is a common problem that many people experience at least once. It happens when excess stomach acid tries to travel upwards from your stomach, causing irritation and a burning sensation in your throat or chest, that?s also known as heartburn. If you have acid reflux then you may also experience the following symptoms:An unpleasant taste in the mouthA persistent cough or hiccoughsBad breathA hoarse voiceBloating and feeling sick