Why do people stop coughing after smoking for a while?

Answer:
The chemicals in the cigarette numb the cilia and other nerves in the airway. This reduces the bodies response to the irritation. After several hours of not smoking such as a nights sleep, the numbness wears off. That's why smokers wake up with a "morning cough". They smoke the days first cig and the coughing subsides. The cilia is numb again.

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I guess its the warmer smoke that albeit smoke is probably warmer than the surrounding air.

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the defensive reflex is suppressed and many of the cilia in the lining of the lung die,so a nice even coating of tar settles in.mmm,rich tobacco flavor.

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That involuntary reaction, unless lung damage has been done, isn't "prompted" by the over-use of nicotine from the cigarette.

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The cilia (Hair like structures that remove gunk) go to sleep right after you smoke a cigarette. If you continue to smoke you wont cough much all day.This explains the morning cough - The cilia are awake since you don't smoke while you are sleeping!

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