The methods of oral local anesthesia include freezing anesthesia, block anesthesia, infiltration anesthesia. ⒈ frozen anesthesia: this method is the application of drugs to make the local oral tissues rapidly dissipate heat, the temperature of the skin will fall rapidly, resulting in the disappearance of local pain sensation, in order to achieve the effect of temporary anesthesia. This method is suitable for incision and drainage of submucosal and subcutaneous superficial abscesses and extraction of loose milk teeth. Pelvic block anesthesia: In this method, anesthetic is sprayed on the surface of the surgical area, and when the drug is absorbed, it will anesthetize the peripheral nerves, resulting in the disappearance of pain in the superficial tissues. It is suitable for incision and drainage of superficial submucosal abscess, extraction of loose permanent teeth and milk teeth. Infiltration anesthesia: This method is to inject anesthesia drugs into the tissues and act on the nerve endings, so that the nerve endings lose the ability to conduct pain sensation, so as to produce anesthesia effects. Patients using oral local anesthesia should not bite their lips and tongues until the anesthesia has worn off. If local oral anesthesia is needed, it should be done under the supervision of a physician to avoid adverse effects.