Canker sores are vexing and common. The reason they occur isn’t clear, but your toothpaste could be a factor. An ingredient ...

I was surprised to learn that a common ingredient often used to make toothpaste foamy has been associated with canker sores ...

Canker sores are small, painful lesions inside the mouth that appear as reddish sores with a white or yellow center, which make it difficult to eat or talk. They are generally split into two ...