I have had CFIDS for 15 years and have FM also For several years now I have had this thick nasal drainage going down my throat. It usually starts after I have something to eat, usually at lunch time (doesn't start when I drink coffee). I have gone to a Nose and Throat specialialist and allergist and nothing has shown up. I can stop this drainage by eating a super sour sucker with sour gum, but other than that, I've found no solution to stop it (not a long term solution). Drinking water changes nothing. Does anyone else have this problem or know of a way either to stop or control it?