Coughs affect almost everyone at some time in their life. A cough that produces mucus is known as productive cough. An allergen or irritant in the air, such as smoke, dust, or pollen, can cause a productive cough. It can also occur as a result of a bacterial infection in the lungs or airways, or as a result of a lung ailment. Productive cough vs … Continue reading What Causes a Productive Cough?