Clinically, poorly controlled blood glucose in diabetic patients can cause oral related diseases, such as periodontitis, radiculitis, pulpitis, and infections of the jaw and face, and oral moss-like infections. Because of the prolonged high blood glucose in diabetic patients, there is a decrease in the body’s ability to resist pathogenic microorganisms due to inadequate antibody production, as well as a decrease in the phagocytic function of leukocytes, which leads to an increase in opportunistic infections and bacterial and anaerobic infectious diseases. The combination of oral-related diseases is significantly higher in diabetic patients than in non-diabetic patients, so good blood glucose control in diabetic patients can reduce the occurrence of related oral diseases, pay attention to monitoring blood glucose, and at the same time improve the examination of oral-related diseases to facilitate early treatment and early healing.