Harvard Health Blog

Don’t judge your mucus by its color

Robert H. Shmerling, M.D., Faculty Editor, Harvard Health Publications, A friend made an offhand comment the other day that caught me off-guard: When I blow my nose, its green, so Im calling my doctor for some antibiotics. I thought this myth had been debunked long ago. In fact, it has been well established that you cannot rely on the color or consistency of nasal discharge to distinguish viral from bacterial sinus infections, or…

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