The pain in the adjacent teeth 6 days after extraction can be caused by various factors, such as the adjacent teeth are cavities, or the trauma of the adjacent teeth caused by improper methods during the extraction process, etc. What should be especially investigated is whether the pain must originate from the adjacent teeth. Under normal circumstances, the adjacent teeth will not be painful after tooth extraction. If the neighboring teeth are healthy and the patient feels pain in the neighboring teeth after tooth extraction, most of the cases are the illusion caused by the pain of tooth extraction trauma after tooth extraction. It is also possible that the adjacent tooth itself has a problem, which has been damaged before the extraction, such as the formation of dental caries. If the decay is deeper, it will be more sensitive to hot and cold stimulation, and the pain may be ignored temporarily because of the blockage of the extracted tooth before, but now the pain will be caused by the stimulation when it is directly exposed to the mouth. Patients are advised to wait for the initial healing of the extraction wound before going to the dentistry department for relevant diagnosis and treatment. In addition, if the extraction process causes trauma to the adjacent teeth due to improper methods, pain to the adjacent teeth may also occur and should be treated accordingly according to the degree of damage to the adjacent teeth. Usually, before extraction, the doctor will make a comprehensive assessment based on the condition of the affected tooth and the adjacent teeth to predict the complexity of the procedure, the size of the trauma, etc. Sometimes, the patient will be asked to take oral antimicrobial agents one hour before the extraction to prevent the occurrence of infection in the extraction socket after the procedure.