The causes of bad breath from acid reflux acid reflux itself isn’t the reason behind bad breath there are two ways this situation could aggravate the smelly symptoms, and cause longer episodes of foul oral breath: 1. Acid reflux causes bad breath. Specifically, bad breath can come about when one is dealing with acid reflux this happens due to the acid rising up all the way up and coming up to the back of your throat coating the entire back of your throat, the acid can produce a rather foul odor when you breathe in and out of your mouth.
acid reflux causes bad breath