Hi Sunny1971!
I used to have quite a few canker sores. What helped me the most was Listerine mouthwash; the original one; not the new flavored ones. I rinsed after each meal. It really worked good. It took away the pain and the canker sores eventually went away. When I didn't have that, I used hot salt water which helped as much. My dentist told me that canker sores were caused by stress. I hope this helps you. Have you tried looking them up on the Mayo Clinic website? They are very helpful with information on everything!
Good luck!
PML