Canker sores form inside the mouth on soft tissues like gums, cheeks, or under the tongue, and are not contagious. Cold sores usually appear on or around the lips and are caused by herpes simplex ...
Canker sores and oral herpes, also called cold sores, are common conditions with some similarities, which could lead you to confuse the two. Canker sores and cold sores both occur in or around your ...