Medical Conditions - Cough

If you have any irritant in your throat like dust, smoke, or fluid, a cough is the body's reflex action to clear the throat. A cough is the most frequent symptom of an infection in the upper and lower respiratory tract like bronchitis, asthma, COPD, common cold, flu, and emphysema. A cough can be dry (non-productive) or accompanied with sputum (productive).