The location of the anesthetic for tooth extraction is related to the location of the extracted tooth and the anesthetic method adopted. Usually, the anesthetic is injected on the soft tissue of the gum near the extracted tooth or on the surrounding nerve. 1, upper anterior teeth: for infiltration anesthesia, the anesthetic is injected on the labial side, and for nerve block anesthesia, the needle is inserted at the top of the oral vestibular groove in the corresponding part of the lateral incisor for infraorbital nerve block anesthesia. 2, maxillary premolar teeth: for extraction, the anesthetic is injected on the buccal side for infiltration anesthesia, or on the palatal mucosa for prepalatal nerve block anesthesia, or for infraorbital nerve block anesthesia. or infraorbital nerve block anesthesia; 3. maxillary molars: anesthesia with anesthetic injection in the posterior alveolar nerve and palatal nerve for nerve block anesthesia; 4. maxillary first molars: anesthetic injection in the proximal buccal root for local infiltration anesthesia; 5. mandibular premolars: anesthetic injection in the labial and lingual sides for infiltration anesthesia during extraction; 6. mandibular premolars and molars: anesthetic injection in the inferior alveolar nerve, the 7. mandibular wisdom teeth: anesthesia should be injected into the soft tissue area of the pterygomandibular fold behind the wisdom teeth to anesthetize the inferior alveolar nerve to achieve a good anesthetic effect.