1, each person’s dental development and health care situation is different, such as wear and hidden cracked teeth, tooth sensitivity may occur after treatment, it is recommended to take a conventional painkiller; tooth sensitivity will disappear 6 a 24 hours after treatment. 2, Within 24 hours after whitening, it is recommended that you avoid: red wine, cola, coffee and tea, soy sauce, spicy oil and stimulating food that is too cold or too mat; avoid using colored strips of toothpaste and colored saliva; avoid smoking. 3. Within 24 hours after whitening, it is recommended to use white or colorless food: milk, white water, colorless drinks, white bread, chicken and white fish, bananas, apples (without skin), yogurt without additives, white cheese, yogurt, cheese, etc.