If the 70-year-old man is in good health, there is no general contraindication to tooth extraction, if he suffers from systemic diseases, such as heart disease, hypertension, diabetes, etc., there are certain contraindications to tooth extraction, as follows. 1. Heart disease: recent history of myocardial infarction, recent angina pectoris, heart disease combined with hypertension, three degrees of atrioventricular block, double bundle branch block should be considered as a contraindication to tooth extraction or delayed extraction. 2. Hypertension: If the blood pressure is higher than 180/100mmHg, it should be controlled before extraction. If the patient has headache and dizziness, the blood pressure is at the highest level or fluctuates a lot recently, even if the blood pressure does not reach 180/100mmHg on the same day, the tooth extraction should be postponed. 3. Diabetes mellitus: when extracting teeth, fasting blood sugar should be controlled at 8.88mmol/L, uncontrolled severe diabetes mellitus should be suspended. There are other diseases that contraindicate tooth extraction, it is recommended to go to the hospital to receive regular treatment.