What's the matter with chest tightness and shortness of breath after exercise?

Chest tightness and shortness of breath may be caused by asthma, chronic bronchitis, bronchitis, or coronary heart disease, rheumatic heart disease, myocarditis, or cardiomyopathy. You can go to the respiratory department of the hospital for lung X-ray examination to confirm the specific cause of chest tightness and shortness of breath.