I am getting black phlegm out of my mouth from past 7 months. I never smoke and never did in past too. I don't know what it is and why it's happening. kindly let me know?
Black phlegm (sputum) can be due to inhalation of highly polluted air. Perhaps the area where you live is always congested with vehicular traffic. You need to use mask with air filter if you are driving two-wheeler in such areas.
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