Cough is a forceful expiration against closed glottis
This maneuver prevents the entry of harmful substances into the lungs and movement of secretions and other airway constituents upward from mouth
Coughing, apart from being a physiological barrier against irritant substances that reach the respiratory tract, is also a symptom of diseases of both respiratory and nonrespiratory origin
Cough is considered as the single most common complaint globally for which patients seek medical attention
An individual’s lifestyle, quality-of-life and sense of well-being can be significantly affected by the presence of cough