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A member asked:
Why is there tiny blackish strand in my phelgm?
A doctor has provided 1 answer
Soot or blood: It may be soot from the air you breathe or bleeding in your mucosa and the black strand reflects altered blood. Do you smoke? Have persistent cough? If yes to either, see your doctor for an evaluation.
Answered 10/4/2016
5.5k views
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