Menstruation comes again after an interval of ten days, first of all, it needs to be clarified whether it is abnormal bleeding or menstrual flow, if it is frequent menstruation may be related to luteal insufficiency, premature ovarian failure, if it is abnormal bleeding may be related to ovulation bleeding, organic lesions and other reasons. 1. Luteal insufficiency and premature ovarian failure: Under normal circumstances, the menstrual cycle should be calculated from the first day of the last menstrual period to the first day of the next menstrual period, and a menstrual cycle of more than 21 days is a normal phenomenon, while a cycle of less than 21 days is an abnormal phenomenon, which may be due to insufficient luteal function, premature ovarian failure and other reasons for the shortness of the menstrual cycle. 2. Ovulation bleeding: menstruation comes again after ten days, if the bleeding amount is relatively small and lasts for a relatively short period of time, it is mostly considered as ovulation bleeding, mostly due to the decrease of estrogen level in the body during the ovulation period can not maintain the growth of the endometrium, so that the endometrium falls off, causing bleeding, which is mostly a normal physiological phenomenon. 3. Organic lesions: when suffering from endometrial polyps, fibroids, endometrial hyperplasia and other gynecological diseases, may lead to abnormal bleeding since the thought of menstruation every ten days and then come back, this time the bleeding is not a menstrual period, should be promptly investigated for reasons, a clear diagnosis of standardized treatment. There are many reasons why menstruation occurs again in ten days, so we suggest you go to the hospital in time for ultrasound of uterine attachment, sex hormone six and other examinations to clarify the cause of the disease and then target the cause under the guidance of the doctor.