Overview
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.
Symptoms
- Round white or grey sores
- Pain when eating
- Redness around the sore
- Discomfort when talking
- Tenderness in the mouth
Causes
- Minor mouth injury
- Stress
- Certain foods
- Vitamin deficiencies
- Hormonal changes