Tooth extraction is a minor outpatient procedure that many people have tried. Although small, tooth extraction can cause a lot of trouble if not taken care of and can even be very troublesome and even life threatening. Therefore, it is important to understand the contraindications of tooth extraction. Pregnant women are not allowed to have their teeth extracted. Pregnant women who have their teeth extracted in the third month of pregnancy can cause miscarriage, and pregnant women who have their teeth extracted in the eighth month can cause premature birth. 2. Tooth extraction is contraindicated in habitual miscarriage. Tooth extraction is contraindicated for patients with blood disorders. Patients suffering from leukemia, re-infarction anemia, pernicious anemia, hemophilia, primary thrombocytopenic purpura, such as tooth extraction, can cause severe hemorrhage and endanger life due to lack of coagulation factors and coagulation dysfunction. 4. Diabetic patients should not have their teeth extracted: as their resistance to germs is generally reduced, tooth extraction can easily lead to various infections and aggravate their condition. 5, heart patients should not extract teeth, because the patient has a sense of fear of tooth extraction, pulling when the mood is nervous, coupled with the pulling and pain stimulation, the patient will at any time cardiovascular accidents and sudden death. 6. Patients with liver cirrhosis and chronic hepatitis should not have their teeth extracted because they are prone to bleeding, which may cause more than bleeding after extraction. 7. Avoid tooth extraction during acute infectious period: tooth extraction during acute hepatitis, active tuberculosis, measles, epidemic hemorrhagic fever, and various acute inflammatory periods, etc., is prone to postoperative infection and inflammatory spread, so tooth extraction is not allowed before the disease is healed. 8. Do not pull teeth during menstruation, as pulling teeth during menstruation can cause excessive menstrual blood, resulting in non-physiological blood loss.