I have been coughing up grey phelgm for months now. It is usually thicker in the morning. (Coughing up phelgm first thing on the morning). Sometimes no phelgm is coming out while coughing, but feeling of a scratch is there.( No sore throat or difficulty in swallowing) clearing throat also brings up grey phelgm, non diabetic only on
thyroid medication. No fever or weight loss Coughing after eating also. Please help.