Swollen gums can be caused by periodontal disease, periapical disease or oral mucosal disease, and treatment needs to correspond to the removal of the cause of the disease, medication or endodontic treatment in order to achieve the purpose of reducing swelling. 1. Periodontal disease: swollen and painful gums may be caused by gum disease or periodontitis, need to remove local irritants such as bad restorations, tartar, local use of hydrogen peroxide or chlorhexidine rinsing medication, periodontal inflammation for periodontal treatment. 2. Periapical disease: periapical inflammation can reach the root of the apical part of the gums below the gums caused by swelling and pain, root canal treatment can be carried out to remove the infected material, some patients need to cooperate with the oral antibiotic metronidazole, amoxicillin treatment. 3. Oral mucosal disease: oral mucosal viral and bacterial infections or immune system diseases can also cause gum swelling and pain, corresponding to antiviral or antibacterial treatment, immune system diseases using immunosuppressants and other drugs. If you want to get rid of swollen gums quickly, it is recommended that you go to the hospital to find out the cause of the problem and use medication under the guidance of your physician.