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General Oral Health

Mouth Ulcers

Small, painful sores inside the mouth that usually heal on their own within days.

Routine — monitor and book a normal check-up

About mouth ulcers

Mouth ulcers are small, painful sores on the soft tissues inside the mouth. They are usually harmless and heal within a week or two on their own. Ulcers that are very large, unusually painful or last more than three weeks should be checked by a dentist.

Common symptoms

  • Round white or grey sores
  • Pain when eating
  • Redness around the sore
  • Discomfort when talking
  • Tenderness in the mouth

Common causes

  • Minor mouth injury
  • Stress
  • Certain foods
  • Vitamin deficiencies
  • Hormonal changes

Treatment options

This is general information, not medical advice. If you have symptoms, see a qualified dentist for a diagnosis.

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Persistent unpleasant mouth odor often linked to bacteria, food or dry mouth.

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Reduced saliva that leaves the mouth feeling dry and can raise the risk of decay.

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