Mary Gamble
I have had terrible canker sores thru the years and was diagnosed with Lupus 6 months ago. Canker sores is one of the criteria for Lupus. You can have a rhuemotoid factor test for this. I also had joint pain . My rhuemotologist has me on 3 mg of Folic Acid and the sores have disappeared. If that doesn't work try a product called ORA5. It cuts healing time in half. Good luck