When there is a swelling and pain behind the posterior groove teeth, the cause should be clarified first, and then given the appropriate treatment, as follows: 1, wisdom tooth eruption: first anti-inflammatory treatment, if the pain is more serious, feasible pericoronal rinse, can be appropriate oral fen-phen and other painkillers; 2, wisdom tooth pericoronal abscess: rinse drug, with the application of anti-inflammatory drugs; severe cases feasible abscess incision and drainage 3, periodontitis: if there is an abscess, the abscess should be performed Incision and drainage. If there is no abscess, oral anti-inflammatory drugs and painkillers can be taken. In addition, when the patient is combined with diabetes, fasting blood glucose level should be tested in a timely manner, if the blood glucose control is stable, the first visit to the stomatology department, with anti-inflammatory drugs, dentistry-related treatment; if the blood glucose level is high, the first visit to the diabetes specialist.