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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cherokeepatti · 61-69, F

Yes it probably is from smoking. It creates free radical damage in your lungs. You could end up with emphysema which makes it harder and harder to breathe. Or lung cancer, premature aging of skin including tearing easily as you age and more susceptibility to chronic bronchitis or respiratory infections. Our immune systems get weaker as we age and that just adds to the susceptibility. Also a much higher risk of heart attacks.