Change toothpaste: There is some evidence that the incidence of canker sores is increased by using toothpaste containing Sodium Laureth Sulfate. This is a foaming agent found in most toothpastes. Rembrandt Gentle White is one such toothpaste. It used to be called Rembrandt Canker Sore Toothpaste but they recently changed the name. You can buy it on Amazon if you can't find it at your local drugstore.
Answered 6/26/2016
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