question: I have a burning/stinging feeling on my tongue and roof of my mouth. Have had it before but my tongue had a white film on it and was swollen a bit. I was given a mouth rinse that they normally give to cancer patients. It went away after about a week. I don't have the white film or swollen tongue but do have the burning/stinging sensation.. Would like to get rid of the problem, not mask it by getting the mouth rinse again. Can you help me? Thank you......