Hi. The basic question is: does it seem like I might have “silent reflux� Secondarily, do I need an upper endoscopy as the next diagnostic test? Oh, and is there really such a thing as a “silent reflux,†in the sense that on this discussion board we see serious GERD with serious symptoms, but no silent reflux (maybe it’s rare?).For eight weeks until 2 weeks ago I was suffering what I will call an Irritable Bowel Syndrome flare-up. (I have had mild IBS for probably 30 years, and am now 50 years of age.)During this time, one of the symptoms I noticed was a moderately raw and foul throat and mouth, worst in the morning. Often it would continue in varying milder degrees all day, and once I recall it got strong again late afternoon. After I wake up I want to go rinse out my mouth with water, because of the raw feeling. At this moment as I write at noon there is just a very small bitter residue in my throat and mouth, though my throat was quite sore this morning and mouth was quite foul this morning.I asked my wife to smell my breath when it was feeling quite foul, and she said it smelled awful. I asked also did it smell acidic, alkaline or bacterial, and she guessed bacterial. There definitely is no food odour.The IBS has calmed down considerably (though not entirely disappeared), I thought the throat and mouth was calming down too but it is definitely still there, and was back to quite raw and foul again this morning.However, I never have heartburn pain.My general practitioner looked at my throat during the IBS flare-up and said it looked a bit irritated, consistent with "silent reflux". He suggested I have an upper endoscopy, since they are putting me asleep anyway on June 9 for my first colonoscopy. When I went back to him recently, he said my throat looked okay this time, but I should still have the upper endoscopy. He doesn’t believe seeing an Ear, Nose, and Throat specialist is worthwhile, for perhaps throat scoping to have a close look at the throat, because he says patients often come back saying the ENT specialist could not say anything except that it might be reflux. When I look at medical books for reflux, I never see upper endoscopy as the first diagnostic step. Also, I wonder that, if my throat is feeling better by the time of the upper endoscopy, there will be nothing to see and it will be a wasted upper endoscopy.Relatedly, is there any need for the upper endoscopy to try to have a peek into my duodenum by passing through that duodenal sphincter, or is a look at the esophogeal sphincter above the stomach enough? (Is peering at the stomach itself also useful in this case?)But mainly, have you heard of "silent reflux" and does this seem like to you?Thanks!!!Peter