I have had clear excessive phlegm in my throat for 3 years. Been tested for acid reflux and post nasal drip. Nothing found that was the cause. I coughed and choked for a very long time interrupting my sleep and quality of life. I do have vocal cord dysfunction. I somehow with my doctor have figured out something to do with spasms in my throat which is causing the phlegm. She has given me muscle relaxers and Lortab and it pacifies the problems. Does this make any sense??