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 [b]relevant[/b] answers.

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OogieBoogie · F

If you are the age you show you are, i imagine its due to more factors than just smoking.
But smoking would be one of them.
Diet, health, environment, stress and underlying conditions, (such as toxins or malfunction), can all contribute.
It could be an accumulation of multiple reasons .