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 ...
The result is a stuffy nose, phlegmy throat or blocked airway. The feeling of built-up mucus can trigger a cough, which forces it out. Advertising In certain chronic diseases of the airways, like ...