<<Disclaimer: Verify this information before applying it to your situation.>> Has anyone had reactions to Tom's of Maine toothpaste? I realize it is supposed to be gluten free. I began using the Sperament flouride toothpaste two months ago. Prior to this I always used Crest. Last week I began developing sore gums. It is painful to brush and the toothpaste seems to "burn". What could be causing the problem? Thanks, Jill/Texas