The term Laryngopharyngeal Reflux (LPR) refers to the back flow of food or stomach acid all of the way back up into the larynx (the voice
box) or the pharynx (the throat). LPR can occur during the day or night, even if a person who has LPR hasn't eaten a thing.
Not everyone with reflux has a lot of heartburn or indigestion. In fact, many people with LPR never have heartburn.