After tooth extraction, you should observe the bleeding situation, pay attention to the protection of the wound, reasonable diet, prevention of infection, pay attention to the time of removing stitches, and observe whether there are any related complications, etc. 1, observe the bleeding situation: don’t leave the hospital immediately after the extraction of the tooth, and wait until the bleeding stops completely; if there is a large amount of bleeding after going home, you should consult a doctor in time. In addition, within 24 hours after tooth extraction, it is normal to have blood in saliva; 2, protect the wound: after tooth extraction, pay attention to protect the blood clot, do not rinse your mouth on the same day. Don’t lick the wound with tongue, and don’t suck and spit repeatedly, so as not to destroy the blood clot, which will cause bleeding; 3, reasonable diet: you can eat and drink only after 2-3 hours of tooth extraction, and only eat warm and cool, soft and thin food, such as rice porridge, egg custard, etc., don’t eat hard, hot food, don’t use the affected side of the teeth to chew the food; 4, prevention of infection: there will be localized swelling and pain after the extraction of teeth, which will gradually ease in 3-5 days. The pain and swelling will be gradually relieved after 3-5 days. If the swelling persists or even worsens, attention should be paid to whether there is localized infection, which should be examined and treated in the hospital in time. Diabetic patients, complex tooth extraction and patients with poor general condition should take antibacterial drugs under the guidance of the doctor to prevent infection; 5, pay attention to the time of removing stitches: if there are stitches in the tooth extraction, the stitches should be removed after 7 days; 6, observe whether there are any complications: dry socket disease may occur after tooth extraction, which is a relatively common complication of tooth extraction, usually seen 2-3 days after tooth extraction, mainly manifested in the alveolar fossa, the absence of blood clot, corruption, malodorization, and the absence of blood clots, which are usually seen after tooth extraction. Block missing, corruption, bad smell, produce severe pain, and pain spread to the head and face, this situation should be timely medical treatment.