Brown blood without menstruation proves to cause a small amount of bloody vaginal leucorrhea during the non-menstrual period, which may have the following causes: Firstly, it may be during ovulation when the ovarian secretion of estrogen levels are slightly lowered and the endometrium is partially exfoliated causing brown blood discharge i.e. ovulatory bleeding. Secondly, when a woman suffers from cervical inflammation, such as cervical polyps and cervical erosion, it can also lead to the appearance of brown blood. Thirdly, when women have meritorious bleeding, endometrial polyps, uterine fibroids, etc., there will also be brown blood. Fourth, when women take birth control pills, if they suddenly stop taking them, brown blood will also appear. When women have brown blood during non-menstrual periods, it is best to go to the hospital for gynecological ultrasound and sex hormone six tests, and use the appropriate treatment according to different causes and parts.