Three years ago I had Bell's Palsy. My doctor treated me with a high dose of Prednisone for 7 days. After that, I noticed that my tongue was smooth with no coating and very sensitive to salt, acidic fruits, spices, and even ketchup because of the vinegar. I have been to 2 doctors and my family dentist. None of them can diagnose the problem. I have tried: iron tablets, sensitive toothpaste, mild non-alcohol mouthwashes, etc. Nothing has worked. It is not painful until I eat a food that irritates it, then it ruins my meal and hurts for about 10 minutes or so. Could the steroid have caused this? Is there something I am missing? Thanks for your help