Periodontitis is a chronic infectious disease of the periodontal tissues. The development of the disease can cause inflammation of the gum tissues, formation of periodontal pockets, causing resorption of the alveolar bone, causing loosening and displacement of teeth or even tooth loss, which seriously affects chewing function and oral health. The end result of these pathological changes caused by the disease can often also be felt directly by the patient. However, it is not clear that the dangers of periodontitis are not limited to the oral cavity. It also has a very important impact on general health. A symptom 1, gum bleeding when brushing teeth or biting hard objects normal gums should not bleed, many people think that gum bleeding is the body “fire” too much, buy a fire toothpaste brush teeth or eat some fire medicine can be. In fact, gum bleeding is one of the earliest symptoms of periodontitis, a signal from the body that tells you that your gums are inflamed, and if you don’t pay attention to this signal, then periodontitis will continue to develop. 2, have persistent bad breath There are many causes of bad breath, of which periodontitis is an important cause. Periodontitis causes bleeding gums, inflammation of tissues, and the production of metabolites by disease-causing bacteria can cause bad breath. 3, loose teeth, position change or chewing powerlessness This is because periodontal disease caused by the destruction of periodontal tissue, teeth support force is insufficient, causing loose teeth, position change or eating with no force. In fact, this is a manifestation of periodontal disease to the middle or advanced stage. 4, feel that the gap between teeth is getting bigger and bigger This is also due to periodontal disease caused by the recession of the gums and the alveolar bone below, causing the space between the teeth that should be occupied by the gums and alveolar bone to be exposed, so that patients feel that the gap between teeth is getting bigger and bigger. In fact, there are many other clinical manifestations of periodontal disease, and the ones listed here are only some of the symptoms that often appear and do not attract enough attention from patients. When these symptoms appear, you should go to the periodontal department in time to stop the further development of the lesion. In recent years, studies have found that periodontitis is an independent risk factor for the development of coronary heart disease and acute myocardial infarction. The incidence of these diseases is significantly higher in patients with periodontitis than in non-periodontitis patients. Stroke has also been reported to occur at a much higher rate in patients with periodontitis than in non-periodontitis patients. Since the oral cavity is directly connected to the respiratory system and is the entrance to the digestive tract, a large number of bacteria in the oral cavity or periodontal pockets can enter the respiratory and digestive tracts directly, causing deep tissue and organ diseases in patients with reduced resistance or chronic diseases, such as reduced lung function, chronic inflammation of the lungs, and triggering or aggravating chronic gastritis and gastric ulcers. The impact of periodontitis on the endocrine system has been studied in relation to periodontitis and type 2 diabetes. Diabetic patients have a low systemic resistance. Similarly, the local periodontal tissue defenses in the oral cavity are weak. The incidence of periodontitis and the extent of the disease are higher in diabetic patients than in non-diabetic patients. Therefore, some scholars have proposed to classify periodontitis as the “sixth complication” of diabetes mellitus. At the same time, some scholars have also studied the relationship between periodontitis and diabetes from another aspect, which has been reported at home and abroad. Thus, it seems that. There is a bidirectional relationship between periodontitis and diabetes, which can influence each other. Foreign studies have also shown that pregnant women with periodontitis have a significantly higher risk of preterm delivery and low birth weight babies than non-periodontitis patients. The results suggest that periodontal infection may have an adverse effect on the outcome of pregnancy in some women. In conclusion, periodontitis is dangerous to the health of the whole body and its impact on the health of the whole body cannot be ignored. The first stage of treatment is the basic treatment stage, which aims to remove or control clinical inflammation and occlusal pathogenic factors, including oral self-cleaning, extraction of poor prognosis and unfavorable restorative teeth, supragingival scaling, subgingival scraping to remove plaque and tartar, selection of antibacterial drugs to control inflammation, and bite jaw adjustment. The second stage is periodontal surgery and fixation of loosened teeth. The third stage is the permanent restorative treatment, which is usually performed 2-3 months after the surgery. The fourth stage is the review and retreatment stage, once every six months, which includes checking plaque control, hygiene promotion, and radiographic examination for further development of treatment plan.