Thank you for the query.
Smoking makes you prone to many lungs diseases including severe inflammation, COPD (Chronic obstructive pulmonary disease
) and lung cancer
. Throat cancer
is also possible.
All this diseases give cough so without additional tests you are unable to rule them out. That is why I suggest you to visit pulmunologist, have chest X-ray (or better chest CT) and spirometry
Laryngologist can diagnose throat cancer.
Hope this will help.