Precautions after tooth extraction mainly include the following points: 1. pain: the postoperative incision is large, the pain is more intense, you need to take painkillers; 2. bleeding: after tooth extraction, you need to protect the incision blood coagulation, avoid brushing and rinsing within 24 hours, avoid eating within 2 hours, eating should not be too hot; 3. postoperative swelling: use cold compresses within 24 hours, hot compresses after 48 hours, you can also take anti-inflammatory and anti-infective drugs to eliminate swelling; 4. suture removal: after tooth extraction, the incision heals better, the suture can be removed after 7 days.