In clinical work, for patients with tooth pain, it is not recommended to extract the tooth at that time, mainly for the following two reasons: the first reason is that most of the tooth pain is due to the presence of inflammation in the tooth, such as decay, pulpitis, periapical inflammation and so on. If tooth extraction is carried out at this time, it is likely that the local inflammation will spread after the extraction, which will cause the extraction wound not to heal and even infection, jaw bone osteomyelitis, gap infection, facial swelling, pain and so on. It is recommended that extraction should be performed after the inflammation has subsided and the tooth is not in pain. The second reason, when the tooth hurts, it is likely to be insensitive to the anesthetic during the process of local anesthesia, making the tooth unable to be anesthetized. When the tooth is extracted, the tooth will be in particularly severe pain, and for the sake of the patient, it is not recommended that the patient have the tooth extracted at this time.