Some of the causes, which may potentially be dangerous or fatal if left undiagnosed, may include:
The coughing and wheezing from heartburn can get so bad they could become triggers for asthma.
It is not clear, however, if frequent heartburn actually causes people to develop asthma. Although many people who have heartburn also have asthma and vice versa, the reasons for this overlap aren't clear.
Experts think stomach acid can trigger nerves in the chest to constrict your breathing tubes in order to keep acid from entering. Again, a simple pH test to look for acid in your esophagus may help you get to the bottom of the problem.