There are three main reasons for the swelling of the tooth packet: first, the tooth suffers from apical periodontitis; second, wisdom tooth pericoronitis; third, periodontal abscess caused by gingivitis or periodontitis. Teeth chronic apical periodontitis will appear in the apical area of the tooth bone destruction and abscess production, the corresponding gums at the redness, swelling, pressure and pain, and even pus, the treatment is root canal therapy, remove the pulp, the tooth on the infected material, apical inflammation absorbed, the gums pus will disappear with it; wisdom teeth peri-coronitis caused by the gums around the wisdom teeth of the redness, swelling and pressure and pain, the treatment is to anti-inflammatory, you can orally cephalosporin, Metronidazole anti-inflammatory drugs, you can also go to the hospital for peri-coronary rinsing and iodine glycerin medication, rapid elimination of inflammation; gingivitis and periodontitis can also cause abscesses in the gums, in the treatment of ultrasonic scaling and periodontal subgingival scraping methods to eliminate the inflammation of the gums and periodontium.