Women in the coitus after the symptoms of blood, may be due to the following factors: 1, may be coitus when the vaginal mucosa is damaged caused by, if in the coitus when the sexual partner action is too violent, easy to make the vaginal mucosa of the capillary damage to rupture, will lead to the patient to appear in the leukorrhea with the symptoms of blood; 2, due to the cervical disease caused by the leukorrhea with the blood, if the patient Suffering from cervical polyps or cervical erosion and other diseases, the cervix will be overstimulated during coitus causing bleeding, due to the relatively small amount of bleeding, thus showing the symptoms of blood in the leukorrhea; 3, if a woman in the ovulation period of coitus with the symptom of blood, it may be a normal physiological phenomenon, due to the decline of estrogen during ovulation, endometrial shedding caused by the phenomenon of bleeding.