Most small mouth ulcers improve within one or two weeks. Recurrent or persistent ulcers may be linked to trauma, a sharp tooth, an appliance, medicines or a general health condition.
This content is general information, not a personal diagnosis or treatment recommendation. A dental examination is needed for individual symptoms.
An ulcer lasting longer than three weeks, increasing in size, bleeding, looking different from previous ulcers, or becoming more painful and red should be assessed by a dentist or doctor.
How can irritation be reduced?
Use a soft toothbrush and avoid very hot, spicy, salty, acidic or rough foods. Cool drinks and softer foods may be more comfortable.
How can a pharmacist help?
Ask about a pain-relieving gel or spray, suitable mouthrinse or another short-term product. Follow the directions and check age suitability for children.
Why do ulcers recur?
Cheek biting, a sharp tooth or filling, a poorly fitting appliance, stress and some nutritional deficiencies may contribute. Frequent or multiple ulcers can be associated with other health conditions and may need further assessment.