A member asked:

I'm a non-smoker with chronic sinus infections that have no environmental cause. why am i getting black streaks in my mucus?

A doctor has provided 1 answer
Dr. John Chiu answered

From the sinus inf: Consult an allergist/immunologist as well as an ENT to find out the cause. The streaks in your mucus may be from old blood from the infection and possibly from a fungal sinusitis.

Answered 3/30/2018

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