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

https://zanderckjg432.timeforchangecounselling.com/reasons-to-select-expert-whitening-over-store-bought-kits

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