Tooth extraction is a common surgical procedure in oral clinics, which can achieve a better treatment effect on dental problems such as apical disease, periodontal disease, multiple teeth, and misaligned teeth. Usually, tooth extraction is not risky, but patients should not relax their vigilance, and certain precautions exist, including rinsing, brushing, and postoperative biting. In addition, patients should have more control over their diet after treatment by tooth extraction: I. Precautions: 1. No rinsing within 24 hours: the patient’s mouth is in an extremely sensitive state after tooth extraction, and in order to avoid causing wound cracking and triggering infection, patients should pay attention to avoid rinsing within 24 hours; 2. Do not brush teeth within 24 hours: on the day of tooth extraction surgery, patients should avoid brushing teeth, mainly because Brushing may cause bleeding from the wound and painful discomfort. However, oral hygiene should not be neglected, and patients are advised to gently rinse their mouths with light salt water after the situation is stabilized; 3. Postoperative biting: In order to promote wound coagulation, patients often need to gently bite sterile cotton balls after tooth extraction, and pay attention to the biting time. If the biting time is not enough, it may cause the wound to be not completely coagulated, resulting in continued bleeding, while if the biting time is too long, it will increase the possibility of adhesion between the cotton ball and the wound, so the clinical opinion is that the biting time after tooth extraction is 30 minutes more appropriate. Dietary control: 1. Do not eat within 2 hours: premature eating will not only stimulate salivary gland secretion, but also increase the risk of wound bleeding and infection, so within 2 hours after tooth extraction, patients should try to avoid any food intake; 2. including puree, porridge, broth, etc., and should finish chewing with the other side of the teeth; 3. Avoid stimulating foods: including foods such as chili, pepper, wine, garlic, etc., which should not be consumed after tooth extraction because they can increase the risk of infection in the patient’s incision.