A number of systemic risk factors play an important role in the development and progression of periodontal disease. In other words, there are indeed some groups that are more prone to periodontal disease than the general population, and if you belong to the following “high-risk groups”, then you need to pay extra attention to your periodontal health. After 35 years old, people are vulnerable to periodontal disease: According to statistics, 3/4 of people over 35 years old will have periodontal disease. Because periodontal disease is rarely painful, and because Chinese people generally rarely have their teeth examined every six months as Americans do, they are vulnerable to periodontal disease. In addition, there is a rumor among the people that they can get a toothache when they get cold, tired or anxious. The so-called fire toothache is actually a chronic lesion of periodontal disease that exists in your mouth, and it flares up under the effect of stress, cold, and so on. This time, it is very easy to induce periodontal disease, so many periodontal disease patients often to the problem is serious when looking for a dentist check. In addition, three groups of people are also vulnerable to periodontal disease: the first category: stress, sadness is a bad stimulus. A woman said that one day she worked late at night and got up in the morning with a terrible toothache. Since then, the root of the disease, after a late shift, a feeling of stress, the teeth will hurt. Scientists have found that periodontal disease is closely linked to stress, sadness, anxiety and other psychological problems. The reason for this is that when people are under greater stress, they release a cortisol hormone, and elevated levels of this hormone increase the rate at which the gums and palatal bone are damaged by bacterial toxins, causing periodontal disease, or aggravating the condition. In other words, periodontal disease symptoms are also a stress response of the body to chronic mental stress. Psychological factors such as obsessive-compulsive disorder, depression, anxiety, interpersonal sensitivity, and hostility, all of which are an emotional response to mental stress, are closely related to periodontal disease. The second category: people who are confident that their teeth are in excellent condition, never have cavities, and rarely go to the dentist. People with acidic saliva can be divided into acidic and alkaline saliva. People with acidic saliva are prone to acid etching and decalcification on the surface of their teeth, so they are prone to tooth decay and pain, so they know to seek treatment from dentists and have less chance to get periodontal disease; while people with alkaline saliva are less prone to acid etching on the surface of their teeth, so they are less prone to tooth decay, but because alkaline saliva contains more calcium ions, it is easy to calcify and form dental calculus. And calculus is one of the main causes of periodontal disease. The third category: people with impatient personalities. Due to the impatience, brushing time is always in a hurry and cannot brush all the teeth. The impatient people brush their teeth both quickly and too hard, easily causing the flesh of the teeth under pressure part of the atrophy lesions, periodontal disease and heart disease are also interrelated. According to statistics, patients with periodontal disease are twice as likely to suffer from fatal heart disease and three times as likely to have a stroke as the average person.