@ling123 @ameliar I noticed that both of you have had sinus issues. Have either of you done nasal flushes? I used to do them every morning when I lived in the Denver area because of dryness and bad air pollution, especially in the winter. I stopped doing them when I moved back to Michigan (and Arizona in the winter) about 10 years ago. After reading your comments and ones in “Lung nodules & scared!” in the Lung Health group, it dawned on me that I should re-start my nasal flushes. Every morning I wake up with a somewhat stuffy nose, the feeling of stuff accumulating in my throat, and coughing. I did a flush this morning and got minor greenish phlegm. I’m wondering if the sinus drainage is going into my lungs during the night and is contributing to the greenish sputum I get once in a while from the coughing. Any thoughts?