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 ...
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, brown, white, yellow, or green phlegm ...