The hazards of toothache can be divided into local hazards and systemic hazards: 1. Local hazards: chronic inflammation forms locally in the mouth as a lesion, affecting neighboring teeth, jawbone and overall oral health; 2. Systemic hazards: bacteria within the dental lesion may cause some systemic diseases, such as subacute bacterial endocarditis, rheumatoid arthritis, periodontal disease and diabetes in the mouth can affect each other, and diabetic patients Periodontal disease is usually more serious than that of patients without diabetes, and periodontal disease, if not well controlled, can also affect the effectiveness of diabetes. Therefore, if some diseases are found to exist in the oral cavity, they must be treated in time, otherwise they will not only affect the health of adjacent teeth or jaws, but also affect the general health.