The conditions that cannot be extracted are as follows: 1. High blood pressure, diabetes, heart disease, liver and kidney function damage, hematological system diseases, acute inflammatory period or tumor are risk factors or even contraindications for tooth extraction. If there are any of the above mentioned underlying diseases, the doctor will conduct appropriate tests, including blood routine, coagulation function, fasting blood sugar, glycosylated hemoglobin, and infectious markers, according to the patient’s specific condition. If, according to the test results, it is found that the physical condition is not suitable for tooth extraction, the doctor will suggest suspending the tooth extraction and referring to the corresponding specialty for treatment before choosing the appropriate time for extraction. 2. Female patients usually cannot have their teeth extracted during the period due to changes in hormone levels and the coagulation function. If teeth are extracted in the first trimester of pregnancy, it will easily lead to miscarriage, and in the second trimester of pregnancy, it may lead to premature birth.