Answer
Seek medical or dental advice if symptoms have not improved after seven days. An ulcer lasting more than three weeks, bleeding, becoming more painful or looking unusual should be examined.
Sources for this answer
- Bonjela — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.