Not everyone with acid reflux has heartburn or indigestion. This is known as silent reflux. Many people never experience heartburn at all. This is what makes silent reflux hard to diagnose. This was my particular problem. A problem with my digestive system was the last thing I expected.
Why is it that some people don’t experience the burn? Either the mixture your refluxing isn’t that acidic or it isn’t staying in the esophagus long enough to do the damage that creates the burning sensation. If even small amounts of the stomach juices get into the voice box and throat other problems will occur. Things like hoarseness, throat clearing, the feeling of a lump in the throat or discomfort or anxiety while talking and even difficulty breathing.
The proper name for this condition is Laryngopharyngeal Reflux (wow, even the spell checker was baffled by that one) or LPR for short. These were my problems and they were terrible. It is a very dangerous situation if digestive juices are getting to the lungs.
Studies are also confirming the link between reflux and asthma.