I quit smoking a while back ago and every once in a while I cough up some blackish-brownish phlegm. I was just wondering if anyone knows why. I never really coughed up brown stuff when I smoked.
Stop Smoking | Smoking Cessation
I quit smoking a while back ago and every once in a while I cough up some blackish-brownish phlegm. I was just wondering if anyone knows why. I never really coughed up brown stuff when I smoked.