Many people think that tooth extraction is a particularly scary thing because there will be different degrees of infection after tooth extraction, such as periodontal infection and gingivitis, etc. In fact, infection can be avoided to a great extent after tooth extraction as long as the corresponding measures are done. 1.Ice immediately: ice should be applied immediately after tooth extraction. Ice can not only relieve pain, but also reduce tissue edema to a certain extent, but in the case that the anesthetic has not yet expired, attention should be paid to intermittent ice and wrapping a small towel outside the ice bag to avoid skin frostbite. In addition, ice must be applied within 24 hours, once more than 24 hours, ice should be avoided. 2. Light diet: At the early stage after tooth extraction, try to eat soft and cool food to avoid aggravating the wound, such as milk, egg custard, thin rice, etc. It is forbidden to eat too hot food within 24 hours to prevent the wound from bleeding; at the later stage of tooth extraction, you can properly eat noodles and other easy-to-chew and digest food. 3. Maintain oral hygiene: Oral hygiene is crucial, it is not impossible to brush teeth after tooth extraction, as long as there is no obvious bleeding after 24 hours, you can brush your teeth normally, but you should avoid vigorous gargling action for the first 2-3 days, otherwise the blood clots clotted in the extraction sockets will not heal after sipping. Dental health is a topic of increasing concern for modern people, and it is important to maintain oral hygiene. With good hygiene, infections can be avoided to a great extent.