If there is pain in the flesh behind the tooth, you can basically consider that the tooth is experiencing pericoronitis of the wisdom tooth. Wisdom tooth pericoronitis is an inflammation of the gum tissue above and behind the wisdom tooth, mainly caused by the presence of obstruction during the eruption of the wisdom tooth and the occurrence of infection by bacteria and food debris in the blind pocket of the gums. When pericoronitis occurs, the patient will experience particularly pronounced pain and swelling of the gum tissue behind the tooth, and in severe cases, it can cause restricted mouth opening, facial swelling, and interstitial infection. In case of pericoronitis, it is recommended to go to the hospital as soon as possible for a pericoronial rinse and medication, as well as a surface tomogram to see if the wisdom tooth is blocked. In addition, anti-inflammatory treatment, either oral or intravenous cephalosporin and ornidazole, is also required. If the wisdom tooth is obstructed, it is recommended that the tooth be removed as soon as the inflammation has resolved.