If you have white teeth, then your smile will be a straight plus. However, not everyone has white teeth. So many people choose to have their teeth cleaned for teeth whitening. So what are the precautions for teeth cleaning? Here are some precautions for teeth cleaning. The following are the precautions for scaling: Precautions 1, people with bleeding disorders, such as patients with thrombocytopenia, leukemia, uncontrolled type 2 diabetes, etc., should pre-apply the appropriate amount of pro-coagulant drugs to control the coagulation rate, so as not to bleed more than when scaling. Note 2: Patients suffering from malignant tumors in the gums should not receive routine scaling to avoid tumor spread. Caution 3: The scaling process is usually a bit sore, and if the inflammation is strong or there is a lot of calculus, people who have not been scaled for a long time may bleed a little. If you can maintain good oral hygiene, most of the bleeding before scaling can disappear automatically in a week or so. If the local area will still bleed, you have to ask the dentist to carefully check whether there is periodontal disease or there is still residual calculus in the deep gum area. Note 4, people suffering from acute infectious diseases, such as acute hepatitis active, tuberculosis patients, etc., such people should wait until the disease is stable before they can go to the hospital for dental cleaning. On the one hand because of their condition, and then also to avoid infecting others. Note 5, the oral local soft and hard tissue inflammation in the acute stage of patients, should wait until the acute period before scaling, so as to avoid the spread of inflammation through the blood, spread. Note 6: The teeth after scaling will be a little sensitive to hot and cold and feel sore, this temporary symptom and the original brushing easy bleeding situation will usually disappear in about a week. If the soreness symptom has always existed, you can consider the anti-sensitive toothpaste on the market, using about a month will improve. Note 7: Patients suffering from active angina, myocardial infarction that has occurred within six months, as well as hypertension and heart failure that cannot be effectively controlled, should not receive routine scaling treatment.