"Smoker's Cough" is a term that is most likely to be known either by regular smokers or those who have had the experience of living with a smoker in the past. Early mornings are usually the time when it occurs. A study done on military recruits revealed that almost 40% of the recruits started having a chronic cough accompanied with sputum while only 12% of the non-smokers among them developed the same symptoms. Long-term smokers are more prone to this kind of cough, so the actual percentage might be higher than what the study suggested.