I don't have any Symptom except that the colour of phlegm/mucus is light to dark grey in colour (looks like ash/smoke colour).it comes when I intentionally cough it out from bottom of throat.
It is present for more than a year or so.
I don't smoke cigarettes
Should this grey phlegm be cause for concern ?
For about a little over a year, I’ve felt a phlegmy, mucus substance in the back of my nose and throat. I
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