Cough is the most frequent symptom of respiratory disease and is caused by stimulation of sensory nerves in the mucosa of the pharynx, larynx, trachea and bronchi. Changes in air temperature or exposure to irritants, such as cigarette smoke or perfumes. The characteristics of cough originating at various levels of the respiratory tract.
Causes of Cough
Acute transient cough is most commonly caused by viral lower respiratory tract infection, post-nasal drip resulting from rhinitis or sinusitis, aspiration of a foreign body, or throat-clearing secondary to laryngitis .
When cough occurs in the context of more serious diseases, such as pneumonia, aspiration, congestive heart failure or pulmonary embolism, it is usually easy to diagnose from other clinical features.
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