Women cannot have tooth extraction during menstruation mainly because of the following two reasons: First, women have abnormal coagulation function during menstruation and patients bleed relatively more, so it is generally not recommended for patients to do elective surgery during menstruation, and it is recommended to do it after 3 days of menstrual cleansing, unless it is an emergency surgery or a surgery that must be done, and the surgery can be done when blood transfusion is prepared. If the patient extracts teeth during menstruation, there is a possibility that the bleeding will be more and difficult to stop. More bleeding is an injury to the patient, and it is also easy for the surgeon to make the surgical field unclear, which affects the surgical operation. Secondly, the resistance of the patient’s body is relatively low during menstruation, so it is especially easy for infection to occur after tooth extraction.