CHEST infections are not out of the norm for this time of year – but sometimes the symptoms could be a sign of something more ...

So COPD patients may produce a lot of phlegm, a lot of coughing throughout the day. “Now if suddenly that phlegm turns dark green, dark brown, or if there's blood in it, that's not something you ...

However, respiratory tract mucus (sputum) infected with bacteria tends to be green, yellow, or another color, not clear or ...