question: I have a chronic cough with excessive mucus and I have had this condition for over 2 years. Test shows my lungs are clear, sinuses are clear. Where can this mucus be coming from and what can I do to get relief from this cough? It is changed my life drastically. I don t cough when I am laying flat. It causes me to vomit quite often because I can t get all the mucus out. Any ideas?