Need more info: Brown spots in phlegm could be due to bleeding in the respiratory system or from inhaled pollutants. The fact that you are bringing up phlegm warrants seeing a doctor for an evaluation.
Answered 6/29/2019
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5 doctors weighed in across 2 answers
A doctor has provided 1 answer
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
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