Answer
The treated area is numb, so heat may be harder to feel and could injure the mouth.
Sources for this answer
- Orajel Mouth Gel — Current selected SmPCemc · Summary of Product Characteristics
- Orajel Extra Strength — 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.