Scaling is a health care practice that is generally not seriously harmful to the human body. You can prevent the formation of various periodontal diseases by removing various kinds of tartar such as bacteria, tartar and pigment from the tooth surface through scaling. It can also reduce the pain, redness and other inflammatory symptoms caused by gingivitis and periodontitis, which in turn can promote the healing of periodontal diseases. However, scaling leads to the elimination of periodontal impurities and the direct contact of tooth roots with the external environment, which may lead to patients’ self-conscious tooth pain and some patients may also experience tooth sensitivity. Patients with gingivitis and periodontitis may also experience pain and bleeding during the scaling process. For patients with severe calculus, scaling can also lead to large gaps and loose teeth, which may lead to dental blockage. In addition, patients with certain diseases may have serious complications during the scaling process, so the following types of patients should temporarily avoid scaling: 1, bleeding diseases: scaling can cause bleeding symptoms of varying degrees, and patients with bleeding diseases such as thrombocytopenia and leukemia should try to avoid scaling to avoid uncontrollable bleeding reactions; 2, infectious diseases: patients in the active phase of hepatitis, tuberculosis, etc. Tuberculosis attack period and other patients, should try to avoid scaling to avoid potential viruses cause cross-infection. Daily brushing does not completely remove plaque, calculus and other tartar, it is recommended that patients regularly go to the hospital or regular dental institutions for scaling every 6 months or so. For gingivitis, periodontitis and other gums repeatedly bleeding, as well as long-term smoking, tea, coffee and other people with more tartar, it is more important to have regular scaling to reduce the chance of oral diseases. In addition, patients who are in a position to do so can also have a regular oral examination once every 6-12 months to prevent the development of periodontal disease.