Cough is the most common symptom associated with upper respiratory tract infection. Coughing is the action by which your body throws out the excess mucus. Cough is the natural defence mechanism as well as warning sign several respiratory diseases. It may be of two types: productive cough which produces phlegm from your lung and the other is non-productive or dry cough which doesn’t produce phlegm. Cough can be acute or chronic. Acute or short-lived cough can lasts for a few days and subside mostly within 3 weeks. Chronic cough can continue more than 8 weeks that can lead to sleep disturbance, cough syncope and work absenteeism.