Canker sores are small sores that form in the mouth. They're usually white or yellow with a red border and can appear inside ...

Question What is the difference between a canker sore and a cold sore? Answer Canker sores and cold sores are common but ...

Here are six reasons why you may have white spots on your gums and how to treat each condition. Canker sores are small yellow or white mouth ulcers that have a red border. They can be painful and ...