This has been going on for guide a while … I just thought it was from the extreme dry mouth. But recently the terrible taste in my mouth has so worsened. I do have it at night. I’ve had a terrible time sleeping the last two years but finally in last six weeks getting 6 hrs a night. That is great for me. In the morning my mouth and taste is terrible so I rinse many times brush with no paste( paste in am makes it worse) then rinse more and wipe all my teeth with a paper towel then try to rinse again and drink a glass of water. Last night after eating dinner and trying a new protein shake I felt terribly sick. I took my Gaviscon antacid and it did nothing! I had a terrible time going to sleep and for the first time in A long while had acid reflux. So nauseous! Finally fell asleep. I’m sorry to explain this so difficult for me to even understand. Doctor had told me if I lose anymore weight I might have to go on a feeding tube but I think my weight is staying normal for me now. I’m trying new things all the time. This seems to be worse since I had my second Covid booster but I try not to think that’s why. I have had GI issues for years before the autoimmune difficulties were found. I have an ileostomy also. Whatever this is the bad taste ( even with brushing three times a day and especially after eating is getting worse. The taste also especially the last few weeks. Thank you for your kindness and reading this poorly written explanation. I used to use biotine products and they helped but it stopped helping.