Cough
Definition
Coughing is an important way to keep your throat and airways clear. However, excessive coughing may mean you have an underlying disease or disorder.
Some coughs are dry, while others are productive. A productive cough is one that brings up phlegm (also called sputum or mucus). Coughs can be either acute or chronic:
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Acute coughs usually begin suddenly. They are often due to a cold, flu, or sinus infection. Typically, they do not last longer than two to three weeks.
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Chronic coughs last longer than two to three weeks.
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