Brush teeth using a toothpaste built for sensitive teeth. These toothpastes consist of potassium nitrate, which will help soothe the teeth's nerve endings. Whitening doesn't have to involve substances. In its place, try out things such as brushing with baking soda or rinsing with hydrogen peroxide. That said, carry on… https://teeth-whitening-sa87530.wikigdia.com/6267944/detailed_notes_on_teeth_whitening_south_africa