Many diabetic patients also suffer from periodontal disease, which manifests as swollen gums, loose teeth, and recurrent periodontal abscesses. This is due to decreased resistance to infection in diabetic patients, thickening of the walls of small blood vessels and basement membranes in periodontal tissues, and occlusion of the canal lumen, leading to increased periodontal inflammation due to insufficient oxygen supply to periodontal tissues and accumulation of metabolic waste. Diabetic patients should pay attention to oral hygiene and carefully control the production of dental plaque. It should be noted that the efficacy of treating periodontal disease in diabetic patients is also related to whether diabetes is controlled, and thorough and effective treatment of periodontal disease also has a positive contribution to the control of diabetes.