There are several reasons for blood in the leucorrhoea: 1. Consider that it may be caused by vaginitis, which is a disease caused by bacterial infection of the vagina. Inflammation may lead to damage to the mucous membrane of the vaginal wall and blood seepage, which in turn produces blood in the leucorrhoea; 2. Cervicitis may also lead to blood in the leucorrhoea, especially when sexual relations occur, this condition is more likely to occur; 3. If the patient has endocrine disorders in the body. Patients suffering from this type of disease are prone to, because of gongbao and lead to blood in the leucorrhea; 4, if the patient is in ovulation, during this special period of female ovulation, the secretion of leucorrhea will increase, and after the follicle rupture occurs, the estrogen inside the female body will suddenly drop, which may cause bleeding in the endometrium, and blood will flow out with the leucorrhea, causing blood in the leucorrhea; 5, there are also some women who wear rings Women will also experience blood in the leucorrhea around the time of menstruation.