(03) 5332 3043

29 Victoria Street, Ballarat

East VIC 3350 Australia

Mouth Sores

Mouth sores can be painful, annoying and unsightly.
Some appear inside the mouth — on the gums, tongue, lips, cheeks or palate (roof of the mouth) or cold sores, can appear outside the mouth, such as on and around the lips, under the nose and on the chin.
Mouth sores can be caused by oral cancer or bacterial, viral or fungal infections.

Some other causes are listed below:

  • Irritations, such as dentures that no longer fit properly and rub against tissues.
  • Loose orthodontic wires or the sharp edge of a broken tooth or filling.
  • Extreme sensitivity to ingredients found in some toothpastes or mouth rinses.
  • Medication, cancer treatment side effects or reaction to therapy.


Most sores are harmless and disappear or remain unchanged. However, some sores are serious and need immediate attention. For example, oral cancer may not be painful at first, but it can be deadly. That’s why regular dental checkups are important. Have your dentist examine any mouth sore or spot that fails to heal within two weeks.
 A biopsy (tissue sample taken for testing) can usually determine the cause or rule out cancer. Your dentist can recognize and often diagnose the type of mouth sore or spot based on its appearance and location.

Any Questions or Concerns?Feel free to talk to us.

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