The most common clinical reasons for blood in the leukorrhea are the following: 1, due to chronic cervicitis, such as cervical polyps can lead to the phenomenon of blood in the leukorrhea. 2, due to cervical cancer, early cervical cancer can lead to the phenomenon of blood in the leukorrhea. 3, inflammation of the lining of the uterus, due to the chronic inflammation will lead to the endothelial tissues are relatively brittle, there will be an irregular fall, resulting in the phenomenon of blood in the leukorrhea. The phenomenon of blood in the leukorrhea. Ultrasound examination often shows that the endometrium echoes unevenly, it is best to do diagnostic scraping in the 6th-12th hour of menstruation, and then sent to the pathology laboratory, according to the results of the treatment. 4, endometriosis, pelvic tumors may lead to blood in the leukorrhea. So in this case, it is still recommended to do a detailed gynecological examination as well as laboratory tests, according to the results of clinical treatment.