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 ...
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 ...
Phlegm can build up at the back of your throat when you lie down in bed and trigger coughing at night ... says wet coughs can also be caused by chronic lung conditions such as chronic bronchitis ...