The causes of black leukorrhea and blood in the leukorrhea are different at different times.1 If it occurs during ovulation, it is normal, caused by a small amount of bleeding in the uterine cavity during ovulation, and does not require treatment.2 If it occurs in the early stage of menstruation, it is also normal. Because in the early stage of menstruation, the endometrium relatively shed less and lead to, with the gradual increase of menstruation, this symptom will disappear. 3, if the patient is occurring in the early stage of pregnancy, black leukorrhea with blood symptoms, may be patients with the phenomenon of preeclampsia, you should go to the hospital in a timely manner, to carry out examinations and fertility preservation treatments. 4, if the patient is not menstruation, the symptoms of pregnancy black leukorrhea with blood, with pain and pain in the abdomen, as well as a small amount of pain in the uterus. And accompanied by abdominal pain and vulvar itching and other symptoms, may be caused by gynecological diseases, should go to the hospital in time for examination, to clarify the cause of the disease, symptomatic treatment.