What is the reason for leucorrhea?

There is a little blood in leucorrhea, the main possible reasons are: first, just finished the birth control ring soon, or the position of the birth control ring has shifted, or placed the birth control ring for too long, may cause leucorrhea with blood phenomenon. Second, chronic inflammatory diseases of the cervix, especially inflammatory erosion and polyp lesions occur abnormal oozing phenomenon, mixed in the leucorrhea outflow, so that leucorrhea with blood. Third, a small amount of endometrial exfoliation during ovulation, resulting in breakthrough bleeding. Fourth, the process of taking contraceptives caused by breakthrough bleeding, can occur in the early days of taking short-acting contraceptives, but also after taking emergency contraceptives. Specific reasons need to be improved related to the examination to be clear.