1. What should I pay attention to before tooth extraction? A: You need to eat, don’t be hungry. Control the blood pressure in normal range and stop taking anticoagulant drugs. Avoid female physiological cycle. 2.Can we delay the discovery of caries? A: It is recommended to treat in time, early detection and early treatment. Because caries will develop, deep caries may increase the chance of pulp infection, once the pulp is infected, it cannot be solved by simple filling. What do I need to pay attention to after filling? A: After filling, it is not a permanent solution, so you should pay attention to eating less snacks and sweets. Although the filling material is not easy to be corroded, but the surrounding tooth tissue can be corroded again, when the surrounding tooth body is destroyed by erosion, the filling may fall off. 4.What about bleeding when brushing teeth? A: Bleeding when brushing is usually due to the fact that the junction between the teeth and gums is not clean and tartar is stored, which produces toxins that stimulate the gums and cause redness and bleeding. At this time should not gently brush, but should carefully brush for a while to try to brush the tartar, if you can clean, brush bleeding can disappear, if the tartar formed tartar brush can not be removed, you need to go to the hospital to clean the teeth. 5, how to do about tooth sensitivity? A: First of all, we need to determine the cause of tooth sensitivity, if it is caused by tooth decay, you need to go to the hospital for filling treatment. If it is caused by eating more sweet and sour food, it is recommended to eat less sweet and sour food and use desensitizing toothpaste. You can apply the desensitizing toothpaste on the sensitive area and brush your teeth after a few minutes, so that the desensitizing effect will be better.