Hello - I have been researching this message board since my diagnosis (fm) in July, and I must say this is the most informative site out there. Nice to know we are not alone! Lately my most troublesome symptom has been a very dry, sore mouth (including mouth sores which my dentist beleives is lichen planus) - thirst is insatiable. I have had many bloodtests, xrays, mri etc - negative results. Any ideas anyone? Thanks.