Swelling on the very back of the gums is an indication of redness and pain at the very end of the tooth bed. The most likely cause is pericoronitis. In the treatment, first of all, local flushing and medication should be applied to the pericoronary area of the wisdom tooth, using saline and hydrogen peroxide to repeatedly flush the blind pockets of soft tissue around the wisdom tooth to remove the food debris and bacteria in the blind pockets, and applying iodine glycerin drops to the soft tissues of the gums for local anti-inflammatory treatment, and taking sufficient oral antibiotics for anti-inflammatory treatment, such as oral cephalosporin capsules, amoxicillin capsules, erythromycin capsules and metronidazole tablets, Amoxicillin capsules, erythromycin capsules and metronidazole tablets for anti-inflammatory treatment. If the face is already swollen and there are swollen lymph nodes and generalized fever, it is recommended to use intravenous infusion of anti-inflammatory treatment, including penicillin antibiotics with Ornidazole. The swollen flesh on the last side of the gums may also be due to periodontal disorders, such as periodontal swelling or chronic inflammation of the periodontium, in which case the periodontium should also be rinsed and medicated, and the infectious substances such as tartar and plaque should be removed through ultrasonic cleaning and periodontal scraping to create a good periodontal living environment so that the swelling of the gums can be eliminated.