Your symptoms of exhalation problem is due to ill effects of smoking
which seems to have resulted in early asthma.
Smoking harms nearly every organ of the body. Smoking causes many diseases and reduces the health of smokers in general.
Smoking causes lung cancer
Smoking causes lung diseases (e.g., emphysema, bronchitis
, chronic airway obstruction
) by damaging the airways and alveoli (i.e., small air sacs) of the lungs.
You must quit smoking immediately.