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The color of your phlegm can indicate many things and can give you a glimpse into the kind of health problem your are currently having but not yet become aware of it. When the color of your phlegm is yellow or green usually it indicates that there is a viral or bacterial infection. The color of the phlegm will not generally indicate a severe health problem. The color of the phlegm can change according to the dust present in the environment around you. Your phlegm can sometimes be black or brown colored if you stay in a polluted area.
