Canker sores are vexing and common. The reason they occur isn’t clear, but your toothpaste could be a factor. An ingredient often used to make toothpaste foamy, sodium lauryl sulfate (SLS), has been ...

If you panic-googled “how to get rid of a canker sore” because you have one of these tender spots inside your mouth—or you feel one brewing—you’ve come to the right place. As tiny as they are, canker ...

In the fall of 2020, Katie Drablos noticed a canker sore on the back of her tongue that wouldn’t go away. As the pain increased, she visited urgent care, wondering if it was a COVID-19 symptom. It ...