I'm new to this board so please bear with me. I've posted this already but I think I posted it on the wrong board. So here it is again. Sorry! I have a lot of lung problems. Would anyone know why there would be little black specs in my mucous? It's very pale yellow in color but with little black specs. I don't work anywhere and I'm stay at home most of the time. I just got over an infection of some kind (sinus, pneumonia)and used antibiotics for 9 days. And got my flu shot this past Friday. Thanks for any help.