Although tooth extraction is a minor surgery, it can cause some trouble if you don’t pay attention to protect the incision of tooth extraction. So what problems should be paid attention to after tooth extraction? 1. The cotton roll placed in the patient’s mouth by the doctor should be gently bitten down and spit out only after 30 minutes. 2. Don’t talk and laugh loudly on the day of tooth extraction, and don’t spit or spit hard, and don’t lick the wound with your tongue, and don’t suck the wound to avoid bleeding caused by negative pressure, and don’t touch it with your fingers or toothbrush and other things. Do not eat food that is too hot or too hard, do not drink strong wine, do not smoke, and do not eat spicy food. 3. Do not rinse your mouth within 6 hours, otherwise it may cause re-bleeding or inflammation of the wound, after 6 hours you can gently rinse with warm salt water. You can brush your teeth the day after extraction, but you should be careful not to let the toothbrush touch the wound. 4. Within 20 hours, there may be a small amount of blood in the saliva, which is normal and should not be feared. Even if there is a lot of bleeding, do not panic, immediately find a piece of sterilized gauze and put it on the bleeding wound and bite it, then go to the hospital for emergency treatment. 5. On the day of tooth extraction, there should not be excessive activity. As the situation requires, it can be reviewed once in the hospital on the next day. If the extraction wound is sutured, usually go to the hospital to remove the stitches 5-7 days after the extraction.