https://www.123articleonline.com/rss/author/253230/elite-dental-groupArticles written by Elite Dental Group from 123ArticleOnline.comen-usCopyright (c) 123ArticleOnline.com All rights reserved. https://www.123articleonline.com/articles/1122231/what-is-a-canker-sore Mouth sores are ordinary ailments which affect many people around the world at some point in their lives. They can appear in any of the soft tissues of mouth like lips, gums, cheeks, tongue and at the floor or roof of the mouth. Small and shallow lesions which originate on the soft tissues in the mouth or at the base of gums of a person is known as canker sores. They are also known as aphthous ulcers. As compared to cold sores, they do not occur on the surface of the lips and aren't contagious, but can be painful. The appearance of these types of sores often appears first in adolescence.