the respiratory tract and can interfere with the normal function of cilia, which help move mucus out of the airways.
As a result, mucus may accumulate more easily.
People who smoke may develop a persistent morning cough accompanied by phlegm.
This isn’t simply a harmless consequence of smoking.
Long-term smoking increases the risk of chronic obstructive pulmonary disease (COPD), lung cancer, cardiovascular disease, and numerous other health problems.
The same principle applies to repeated exposure to secondhand smoke.
If you smoke
Stopping smoking is one of the most important steps
