1. A series of necessary examinations and treatments should be carried out before tooth extraction, and the patient should truthfully report the medical history to the doctor.

2. Before tooth extraction, dental calculus and dentures in the oral cavity should be thoroughly cleaned to ensure oral hygiene and prevent postoperative infection, swelling and bleeding.

3. If the tooth extraction is arranged in the morning, ensure the quality of breakfast and avoid tooth extraction on an empty stomach, so as to avoid nervousness leading to hypoglycemia.

4. Have enough rest before tooth extraction to ensure abundant energy and physical strength. If you are tired, you should avoid tooth extraction.

5. If an inflamed tooth or root is pulled out, antibiotics should be taken according to the doctor's advice before tooth extraction to prevent postoperative infection.