Gums on fire with symptoms of toothache should go to the stomatology department to do radiography. If the apical part of the tooth is found to have a low-density image, it can be diagnosed as apical periodontitis, which needs to be treated by taking the nerve and with oral anti-inflammatory drugs, such as amoxicillin plus metronidazole tablets or roxithromycin plus metronidazole tablets. If there is no abnormality in the apical part of the tooth, the periodontal membrane is widened, and there is pus in the gums due to periodontal disease, periodontal treatment is needed. It is recommended to do basic scaling, if necessary, do subgingival scraping, local can be medicated, commonly used drugs have minocycline hydrochloride or use iodine glycerin. If the problem is caused by periodontal and the root apex, this is retrograde pulpitis, which requires periodontal treatment, and also requires treatment of the nerve.