Usually breathing trouble arises ascribable to the some other maladies like asthma. But sometimes people won’t know shortness of breath also the major sign for the lung cancer. But this is not accurate for many reports offered by the most of the research centers. But usually some may get this problem due to long walk or due to continuous exercise. But it is necessary who are having this problem as a continuous for a month or week , they must undergo medical check up to determine whether the person is suffering from this vulnerable disease or not. In most cases, we cannot able to observe at the most former stage. There are many tests available today to indicate the breathiness problem. The physicians must undergo the defined test after the correct declaration of symptoms. But it not sure that this part will become the leading and most interesting engender for lung cancer. There is no exact time period for the symptoms. This may or may not come only for limited amount of period.