Blood leukorrhea after taking birth control pills may be caused by the following reasons: 1, omission of the drug, if in the process of taking birth control pills which day forget to take, there may be such a phenomenon. 2, every day did not set the time to take, take birth control pills is best to eat every day a fixed period of time, to be able to maintain the body’s hormone level stability. If the time is not fixed, it is easy to cause the hormone level in the body is not stable, can not maintain the normal development and growth of the uterine lining, resulting in a small amount of endometrial detachment, causing a small amount of bleeding.3, the quality of the drug is damaged, the quality of the pills by moisture led to a decline in the quality of the pills, will also appear this situation. So you can continue to take birth control pills when you find this situation, and you need to deal with it if there is more bleeding.