I have quit smoking after 15 year I am at the 12 week mark. I never smoked that heavily but did non the less. I am 40 years old and am really feel my health improving further. I have always been and am physically very fit and have a good diet. When I stopped in the first 4 weeks I started out coughing up phlem with black specks and grey mini hairs. This has passed and for the next month I had a wet cough with thin clear phlem particularly upon arising and after excersie. This has now given way to a dry unprodcutive cough that has a small strands of quit thick yellowish tinged phlem when I manage to cough up anything. I now have this dry unproductive cough quiet regularly particularly after excersing. IS this just part of the healing process and when will it be complete. My lungs feel very clear now but tye cough remains.