After teeth whitening, it is advised that you avoid substances that stain, such as tobacco and red wine, for about a week. This is because the pores in your teeth are open and your teeth are more receptive to staining factors after your teeth-whitening treatment. Your teeth may also feel slightly sensitive to very hot or cold foods and beverages.
If you can’t go without your morning coffee or afternoon wine, try drinking through a straw to avoid contact with your teeth as much as possible. It is also important to keep the mouth clean by brushing and flossing regularly.