Phlegm is usually clear or white. A higher-than-normal amount of phlegm can build up in your nose, throat, and lungs when you are sick. This build-up may cause coughing and discomfort. Bloody ...
About 4% to 10% of the adult population experiences chronic cough — a cough lasting eight weeks or more, or at least four weeks for children. A chronic cough doesn't call for immediate medical ...
Chronic coughs can be "symptomatic," meaning they have an underlying cause, or "refractory," meaning they continue despite recommended treatment. Mucus produced from a wet cough can be clear ...