The items that need to be tested for tooth extraction mainly include routine blood tests, clotting time, blood biochemistry and infectious diseases. 1. The general blood test is to check the number of red blood cells, white blood cells and platelets to see if there is more serious anemia and lower platelets, which will cause more bleeding after tooth extraction. 2. Coagulation time is mainly to see whether the patient has a clotting mechanism disorder, which will have a certain impact on the bleeding after tooth extraction. 3. Blood biochemistry tests usually check the liver function, kidney function and fasting blood sugar to see if the patient can tolerate tooth extraction. 4. Infectious diseases mainly include Hepatitis B virus, Hepatitis C virus, HIV, syphilis, etc. Special attention should be paid to sterilization during or after tooth extraction. It is recommended to consult with a professional doctor for specific advice.