Loose teeth in diabetic patients are usually due to hyperglycemia leading to periodontal granulomas as well as periodontal pockets, which leads to alveolar bone resorption, tooth loosening and loss. Patients are advised to consult with dentistry and endocrinology to understand the cause of the disease before considering treatment options. Diabetic patients with loose teeth, which may require tooth extraction and denture installation after diagnosis by the doctor, require aggressive control of blood sugar first, which should be combined with dietary control and exercise, and wait for blood sugar to drop to normal before treatment. If blood sugar control is poor and surgery is needed in the near future, insulin can be used to lower blood sugar if necessary to avoid poor blood sugar control affecting wound healing and even inducing oral infection. Diabetic patients should eat mainly cereals and consume more foods and vegetables with high dietary fiber. When cooking, pay attention to limit soy sauce, chicken essence and other condiments with high salt content, and eat less processed foods such as smoked and pickled. Exercise appropriately and do daily blood glucose monitoring to keep blood glucose in a reasonable range.