Brown Phlegm Causes WisdomCard

Our Guides and Physician Review team have organized the Top 10 Health Resources on Brown Phlegm Causes and compiled helpful research notes below.


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Research Notes on Brown Phlegm Causes


Mucus that thickens and becomes discolored is called phlegm. Generally, a simple diagnosis can be made based on the color of your phlegm. Brown phlegm, as well as yellow or green phlegm, is a sign that your body is fighting an infection.1

Fast Facts:

  • Coughing up brown phlegm is also a sign of too much smoking.2
  • Resin in cigarette smoke causes phlegm to appear brown. 2
  • Healthy mucus is clear or white.2
  • Consult a doctor immediately if you cough up bloody phlegm.2

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Research Notes References

  1. GetRidofThings.com: Get Rid of Phlegm
  2. 2.0 2.1 2.2 2.3 Economic Expert: Phlegm Coughing Symptom

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