question: I am a 57 yr. old female in very good health. I seem to have a very sensitive inside of my mouth. If I eat something too hard like toast or something with hard edges, like crackers or chips, the mouth can be sore for days or 2 weeks. The other issue is sometimes my tongue can feel like I have burned the end of it on a hot drink, even though I have not burned it. I have been to the doctor and dentist , but nobody has been able to tell me what the problem could be. Could it be a vitamin deficiency?