Hello,
Asthma is an important cause of chest tightness, difficulty in breathing and light headedness, but it is not the only factor for such symptoms. Others may include underlying
lung(
pneumonia, bronchitis etc) and cardiac pathology(angina, Myocardial infarction).It may also be due to gastritis and GERD.
Asthma is an inflammatory disorder of the airways, characterized by periodic attacks of wheezing, shortness of breath, chest tightness, and coughing.