and on or under the tongue. They can make it painful to eat, drink, or even brush teeth. Canker sores are different from cold sores (fever blisters), which are caused by a virus and found outside the ...

From colour changes to painful sores, a dental expert explains what to look for when checking to see if your tongue is ...

Canker sores (also known as aphthous ulcers) only happen inside the mouth. You can get them on or under the tongue and on the inside of the cheeks and lips — the ... shallow white or yellowish wound ...