Aunt period refers to the period of female menstruation, under normal circumstances can not be extracted, as a contraindication to tooth extraction. Tooth extraction is a common therapeutic operation in stomatology, using professional stomatological instruments, after taking appropriate anesthesia, a therapeutic operation for the removal of abnormal teeth, is a traumatic operation, the local tissues can produce a certain degree of bleeding, swelling and so on. During menstruation, estrogen level is low, resistance is relatively poor, endometrial shedding at the same time can consume the body’s coagulation substances, so that the coagulation function is relatively low, at the same time, during menstruation itself, there is endometrial bleeding, such as extraction of teeth caused by the bleeding of a large amount of blood, it may also cause hemorrhagic anemia phenomenon. Therefore, it is not suitable for women to extract teeth during menstruation, and it is recommended to follow the professional doctor’s advice on the time of extraction.