Gum swelling and pain may be caused by wisdom teeth pericoronitis, periapical inflammation and other diseases, can be oral anti-inflammatory drugs, incision and drainage, removal of wisdom teeth, root canal treatment and other ways to treat inflammation, submandibular lymph node enlargement can be relieved, as follows. 1. Wisdom tooth pericoronitis: Inflammation of the soft tissues around the incompletely erupted or blocked wisdom tooth, the treatment is to use local saline to rinse the affected area, oral anti-inflammatory drugs to reduce the inflammation, such as metronidazole, incision and drainage of pus formed locally, and removal of the wisdom tooth after the acute inflammation subsides. 2. Periapical inflammation: Inflammation of the periapical tissues, after the formation of pus, incision and drainage under local anesthesia, at the same time taking anti-inflammatory drugs to reduce inflammation, such as metronidazole, can be at the same time to open up the pulp cavity, root canal treatment. There may be other causes of gum swelling and pain, it is recommended to go to the hospital in time, after clarifying the cause of the disease for targeted treatment. Drugs should be used under the guidance of a doctor.