Dani: Dryness can cause many foods to be uncomfortable on the tongue. I have Sjogren's(an autoimmune disease, affect endocrine system)and before I was diagnosed (and before I knew I needed to drink a lot more water) I had trouble with coffee, chocolate, walnuts and wine. The walnuts have tanin, as does red wine, and coffee; I am not sure about chocolate but something it is affects my tongue when I am dehydrated. Drinking lots of water helps me. It may be partly a dryness issue w/your mom. Good luck - Candace

Sister to guy w/Tongue cancer, Stage IV, Dx 4/03, ended Tx 9/03. 12 clear exams.