I HAVE SEVERAL CANKER SORES ON MY TONGUE, CHEEK AND UNDER TONGUE. THESE SORES POP UP WEEKLY. THEY ARE SORE, WHITE AND CAUSE PAIN WITH DIFFICULTY EATING! I HAVE USED CAMPHO-PHENIQUE, MOUTH SORE GEL, TRIAMCINOLONE ACETONIDE DENTAL PASTE AND MOUTH WASHES. I HAVE RHEUMATOID ARTHRITIS, AM 62 YRS OLD AND IN FAIR HEALTH. DO YOU HAVE ANY ANSWERS OR SOLUTIONS?