Canker sores are painful, round ulcers that form on the soft tissue in the mouth, such as the inside of the cheeks or lips. The ulcers often start with a minor trauma to the mucosal lining ...
The link between toothpaste and canker sores Canker sores are painful, round ulcers that form on the soft tissue in the mouth, such as the inside of the cheeks or lips. The ulcers often start with ...