Though black phlegm is not always a cause for concern, it could be a sign of lung cancer or exposure to a pollutant. Figuring out the cause will help the doctor recommend the best course of treatment.

Persistent or recurrent black mucus should prompt urgent medical consultation to rule out malignancy and initiate appropriate treatment. Early detection of lung cancer significantly improves ...

Lung cancer is one of the most common forms of cancer in the UK ... Some patients may also cough up blood or phlegm. And ...