In this article, we’ve covered all about Mouth Sores, Canker Sores, and Cold Sores. Canker Sores also called aphthous ulcers, are small, shallow lesions that develop on the soft tissues in your mouth or at the base of your gums. Unlike cold sores, canker sores don’t occur on the surface of your lips and aren’t contagious. However, They can be painful…