CankerSoreAwareness

How to Prevent Canker Sores

Understanding Canker Sores and Their Causes Canker sores, also known as aphthous ulcers, are small, painful lesions that form inside the mouth. These sores are not contagious and usually heal on their own within one to two weeks. However, they can cause discomfort while eating, drinking, or speaking, and can recur frequently in some people. The exact cause of canker…