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