How is chest tightness and shortness of breath feeling that the air is not enough to breathe?

How old are you? Have you been to the hospital for examination? Generally, if you feel chest tightness, shortness of breath, and poor breathing, it may be a lung or heart problem, such as chronic bronchitis, asthma, emphysema, cor pulmonale, insufficient blood supply to the heart, myocardial ischemia, myocarditis, and organic lesions of heart valves. If you have this condition for a long time, I suggest you go to the hospital for ECG, lung X-ray and heart color Doppler examination for further diagnosis. People's cardiopulmonary function will increase with age.