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

https://devinjdan182.cavandoragh.org/reasons-to-select-professional-whitening-over-store-bought-kits-1

If you clench or grind, discuss it before whitening; enamel wear and exposed dentin can heighten sensitivity, needing tailored protocols and gentler gels.