mouth sores from dental work
The top 5 reasons why people get canker sores Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth. Mouth Ulcers Sometimes, it's a common injury, such as something as innocuous as biting the inside of your lip (either from habit or by accident), accidentally injuring gum tissue with your toothbrush or having poorly-fitted dental work (loose dentures or a rough spot on a crown that rubs against the inside of your mouth).