My dentist, doctor, and neurologist thought my burning mouth was the trigmenial nerve. I tried many things. After 3 plus years I got an esophagus scope and was diagnosed with gastritis with hyperplasia, reflux of acid and bile, and Barrett’s esophagus. The gastritis and reflux and esophagus damage has been causing my burning mouth. I am taking Nexium 40 mg twice daily, sucralfate liquid 10 ml 1hr before meals and at bedtime and baclofen 5 mg 3 times during day and once at bedtime. Healing has been slow. Good 30 days before I noticed sucralfate liquid stopped burning for a few hours. After 60 days burning was down enough I could stop pregabalin and pain pills. Now burning might. Real thru during day I chew pepsid ac complete which stops that burning pretty quickly. Reflux treatment is working for me. Sucralfate coating the esophagus and stomach is really important in getting burning relief. Hope this helps you.