Although tooth extraction is a kind of minor surgery, if you don’t pay attention to the protection of the wound after tooth extraction, it can also cause adverse consequences such as infection and non-healing of the wound, so what matters should be noted after tooth extraction? 1. The cotton block or gauze placed by the doctor in the patient’s mouth should be spit out only after 30 to 50 minutes of gently biting, and should not be spit out too early or too late; 2. Do not rinse your mouth or brush your teeth for twenty-four hours after tooth extraction to prevent bleeding or inflammation caused by the rupture of the blood clot in the extraction wound. If you rinse your mouth, you can rinse your mouth with warm salt water after 24 hours, but you must rinse lightly. When you brush your teeth, be careful not to touch the wound and trauma with the toothbrush; 3. 2 hours after tooth extraction before eating, it is appropriate to eat warm, cool, liquid or semi-liquid food on the day of surgery, and it is not appropriate to chew with the side of the tooth extraction; 4. Do not use your tongue to lick the wound, and do not suck the wound to avoid bleeding caused by negative pressure. Do not chew food with the wound after tooth extraction, avoid eating too coarse, too hard and too hot food, avoid smoking and drinking alcohol; 5. It is normal to have a small amount of blood or slightly bloody color in the saliva spit out on the day or the next day after tooth extraction, do not be afraid. Do not panic if there is more blood in the saliva, but immediately put a sterilized cotton strip or gauze on the bleeding wound and bite it, then go to the hospital for treatment; 6.