If you clench or grind, discuss it before whitening; enamel wear and exposed dentin can increase level of sensitivity

https://devinjdan182.cavandoragh.org/the-ultimate-guide-to-professional-teeth-whitening-what-to-anticipate

If you clench or grind, discuss it before whitening; enamel wear and exposed dentin can increase level of sensitivity, needing tailored procedures and gentler gels.