Precautions after scaling are as follows: 1, there may be tooth soreness or a small amount of blood on the day of scaling, even for 1 week, which are normal; if there is progressive tooth soreness or increased bleeding, you should go to the hospital for examination; 2, do not brush your teeth the night after scaling and avoid touching your teeth with your hands to avoid the loss of fluoride on the tooth surface; 3, you should not eat too cold, too hot, spicy or dark food within 2 weeks after scaling, and you should not brush your teeth within half an hour after meals to avoid demineralization of tooth enamel.