Yes: Black can be from old blood. Coughing up blood is never normal and can be a sign of serious problems in your lungs. It could be that you just have some bleeding in your nose and that is what you are coughing up. See your doctor for an evaluation to make sure there are no serious problems.
Answered 4/26/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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