The whole process of treating the nerve includes identifying the affected tooth, local anesthesia, opening the pulp, disinfecting and sealing, and repairing the defect. 1. Identification of the affected tooth: X-rays are taken to check the anatomy of the root and root canal of the affected tooth. 2. Local anesthesia: Local infiltration of the affected tooth site with lidocaine or ativanacaine, followed by incision of the pulp cavity from below the jawbone with a split drill, removal of the top of the pulp chamber, and scraping out of the larger coronal pulp with a digging spoon. 3. Pulpotomy: The pulp of the affected tooth is opened to expose the root canal, prepare, clean and shape the root canal to treat the nerve. 4. Sterilization and sealing: After the root canal is prepared, it should be closed and sterilized, and then the root canal of the tooth should be cleaned out with a nickel-titanium endodontic file, and then put camphor powder or calcium hydroxide in it to sterilize and seal the medicine. After sealing, the patient’s tooth should be checked to see if the infection is under control. 5. Repair of defects: When there is no obvious pain in the nerve for 5~7 days, the canal is sealed with sealed dental adhesive, the bottom is cushioned in layers, and then the defects are repaired with glass ionomer cementum and so on. Patients after the treatment of dental nerve are recommended to have a regular review under the guidance of the doctor. In daily life, we should pay attention to more rest, can not eat spicy and stimulating food, to keep the mouth clean, to brush teeth, rinse mouth, do not eat sweets, you can drink more plain water, diet should pay attention to nutritional balance and so on.