Can there be anything that can prevent canker sores?

Sometimes: Canker sores can be caused by stress, or trauma. Some people are sensitive to sls in toothpaste or cinamon. Vitamin deficiencies, especially b vitamin can increase out breaks. Some of these thngs you can control and hopefully decrease the number of canker sores. If you get alot or they are really big you should see your doctor and have your immune system checked.