A 25-year-old female asked:
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can post nasal drip collecting over night cause brown mucus in throat in the morning?

1 doctor answer
Dr. John Chiu
Dr. John Chiu answered
57 years experience Allergy and Immunology
Yes: The a.m mucus sample is usually concentrated and thus may look yellow. IN the presence of a sinus infection, the mucus (when present) should be consistently yellow or green.
Answered on Jan 29, 2018

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