A productive cough is a type of cough that brings up mucus or phlegm from the respiratory tract. This mucus can be a sign that the body is clearing out irritants, infections, or excess secretions. Common causes of a productive cough include bronchitis, pneumonia, and chronic obstructive pulmonary disease (COPD). Unlike a dry cough, which does not produce mucus, a productive cough helps to keep the airways clear. It is important to monitor the color and consistency of the mucus, as changes can indicate different health issues. If a productive cough persists, it is advisable to consult a healthcare professional.