Full moon if menstruation indicates the following problems: First, the ovarian function has been restored, the beginning of the cycle of secretion of estrogen and progesterone, resulting in changes in the uterine lining, when estrogen and progesterone show a decline in the endometrial lining will be manifested in the shedding of the lining of the menstruation. Secondly, it means that there is no breastfeeding, and the level of lactogen in the body is relatively low, and menstruation will also occur at the time of the full moon. In this case, it is recommended to distinguish between menstruation and abnormal vaginal bleeding. If there is intrauterine residue, when there is stripping between the residue and the uterine wall, it will lead to vaginal bleeding. If there is any residue it is recommended to give a clearance operation as soon as possible and prevent infection after the operation.