Answer
Only as the specifically diluted rinse or gargle described in the product leaflet for minor mouth-lining inflammation. It must not be swallowed.
Sources for this answer
- Care Tea Tree Oil 100% / Natures Aid Tea Tree Oil 100% — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.