Pain in the adjacent tooth 6 days after extraction is usually not considered to be due to infection. This may occur due to the tooth itself, such as the wisdom tooth is positioned crookedly and causes the pain due to the decay of the adjacent teeth; or it may be caused by the trauma of the adjacent teeth during the extraction process. If the adjacent tooth is already decayed, and the decay is deeper and more sensitive to hot and cold stimulation, the pain of the adjacent tooth may appear after the extraction. Because there is no obstruction from the extracted tooth, the carious tooth is directly exposed to the mouth, and with the stimulation of hot and cold temperature will cause pain. It is recommended to visit the endodontic department of the dental hospital after the initial healing of the wound. If the neighboring teeth are damaged during the extraction, they should be repaired according to the trauma. Depending on the condition of the affected tooth, the surgeon will anticipate the complexity of the procedure and the size of the trauma. An oral dose of antibacterial agent can be given one hour before the extraction to prevent the occurrence of infection in the extraction socket after the procedure.