Could smoking be the cause of this, and if so, what problems might there be if I don't quit smoking?

I have a cough that doesn't go away for months, shortness of breath and phlegm. I have wheezing. Could this be due to smoking? What problems can happen if I don't quit smoking?
Give me relevant answers.

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Doomflower · 41-45, M

Yes it is very likely it is due to smoking. If you don't quit you can look forward to COPD, emphysema, lung/mouth/throat cancers, and a drastically shortened life span.

My mom died of lung cancer after smoking for decades. At the end she was gasping like a dying fish, confused, unable to speak, unable to communicate her needs. It was horrible.