Here, some of the biggest offenders: If you notice a tiny, round ulcer with a white or yellowish center and a red edge, you might have a canker sore. "They can pop up on the roof of your mouth due ...

Oral cancer may first appear as a white spot or sore on your tongue, the gums, the roof of your mouth ... in taste or notice unusual bleeding in their mouth. Talk to your healthcare provider ...

Two such signs can manifest in the mouth. The Cleveland Clinic points out that a physical indicator of B12 deficiency is a "sore" mouth and tongue. The NHS also cites a "sore and red tongue," or ...

gums and the roof of the mouth all look a normal, healthy colour. Seek help from a dentist or a health professional if you see any of these signs: red, swollen or bleeding gums that last for more than ...