I have had PBC since 2004 and yesterday went for a Sheerscan, my consultant doesn't think a biopsy will change anything. In the last six months have had a strange sensation in my mouth, a sort of tightness inside my cheeks and lips. The dentist has diagnosed an autoimmune condition called Sjogren syndrome or Lichen Planus - I would need a blood test to verify. I have an under active thyroid already? Does anyone else have this mouth condition? I'd like to learn more.