Mouth ulcers are common and often heal within a week or two. An ulcer that lasts more than three weeks should be checked by a dentist or doctor.
What should I notice?
Note where the ulcer is, how long it has been present and whether it is painful, bleeding or different from previous ulcers. Tell the clinician if you have ulcers elsewhere or other symptoms, such as painful joints.
How can I reduce irritation?
A soft toothbrush and softer foods may be easier while the area heals. Avoid foods and drinks that clearly irritate it. A pharmacist can advise on suitable pain relief or other products; follow the instructions and mention other medicines.
When should it be checked?
See a dentist or doctor if the ulcer lasts longer than three weeks, is unusual for you, bleeds or becomes more painful and red. Most ulcers are not serious, but a persistent ulcer needs an examination.
What happens at an appointment?
The clinician will ask about the ulcer and examine your mouth. They can explain whether monitoring, treatment or further investigation is appropriate. Bring a list of medicines and describe any repeated episodes.
Frequently asked questions
Do all mouth ulcers need urgent treatment?
Many heal on their own, but a persistent or unusual ulcer should be checked.
How long should I wait?
See a dentist or doctor if an ulcer lasts longer than three weeks.
Can a pharmacist help with pain?
A pharmacist can discuss suitable products for symptom relief.
What if the ulcer bleeds?
Arrange an assessment if it bleeds or becomes more painful and red.
Related reading
Further reading
Explore Dental services or contact the team about appointments.
This article is general information and does not replace individual clinical advice.