3. Wheezing Sound while Breathing
Wheezing is caused by breathing through obstructed and narrow air passages. Obstruction of the air passages is caused by many years of smoking which leads to excess mucus build up on the air passages. The excess mucus does narrow the volume of passage for the inhaled and excess air and this kind of buildup might cause some musical sound (wheezing when an individual is breathing). Wheezing and shortness of breath do not often occur at an instant and do usually tend to gradually get to worse with time if smoking or exposure to second hand smoke is continued. Wheezing and shortness of breath are usually further accelerated when further chest infections from bacteria and viruses are contacted.