Some women feel that there is a bloody discharge on the underwear, called bloody leukorrhea, sometimes more and sometimes less specifically the following situations. First, ovulation bleeding is a physiological situation occurs during ovulation and in the middle of two menstrual periods, usually because of changes in estrogen levels, there may be shedding of the uterine lining leading to a little vaginal bleeding. Second, there is an intrauterine device (IUD). The intrauterine device is usually metal, which will stimulate the endometrium, causing the endometrium to shed, and then bleeding, especially if you have just had the IUD for a short period of time. Such as within six months, or within a year, often have irregular vaginal bleeding, belong to adapt to the ring. Third, cervical erosion, now known as cervical columnar epithelial ectasia, the doctor can see the surface of the cervical epithelium is smooth, and the columnar epithelium in the uterine cavity canal is bright red. When the columnar epithelium of the cervix moves outward to the surface of the cervix, it is called columnar epithelial ectasia. The color is red and the tissue is brittle and bleeds easily, especially when touched during intercourse, called contact bleeding.