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7. What Black Phlegm Means

Black phlegm is often caused by inhaling something such as smoke or coal dust. Occasionally it is caused by a fungal infection. Here are the common causes of black phlegm:

  • Smoking crack, heroin, marijuana, or other drugs
  • Smoking cigarettes
  • Black lung disease form of Pneumoconiosis
  • Black yeast (fungal) infection (usually rare)

Phlegm Colors Explained: What Each Shade Indicates

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Disclaimer

This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.