The presence of blood in the leukorrhea when going to the toilet may be a sign of menstruation, but it may also be caused by ovulation bleeding, placement of a birth control device in the uterus, and gynecological diseases. 1. The onset of menstruation: when you go to the toilet, there is blood in the leukorrhea, which is in line with the menstrual cycle, and there is no other manifestation of the above, it may be the existence of normal menstruation. 2. Ovulation bleeding: when women are ovulating, due to changes in hormone levels in the body, it can also lead to a small amount of blood in the leukorrhea, which doesn’t last long, and the amount of bleeding is relatively small, and will usually return to normal. 3. Placement of birth control device in the uterus: women who place birth control device in the uterus may cause mild bleeding, when going to the toilet, you will find blood in the leukorrhea, accompanied by mild pain in the lower abdomen. 4. Gynecological diseases: the presence of some gynecological diseases, such as uterine fibroids, vaginitis, cervical inflammation, cervical polyps and so on, will cause irregular vaginal bleeding, and is accompanied by lower abdominal pain, vaginal itching, discharge odor and other symptoms. In addition, there may be other factors leading to the occurrence of the situation, it is recommended that patients go to the hospital in time for examination, to clarify the cause of the disease, and then follow the doctor’s instructions to deal with the treatment.