Brown discharge after taking oral contraceptives is considered to be a typical manifestation of adverse drug reactions. If it is relatively small, you can observe it for 3-7 days because it will subside in about 7 days, and pay attention to personal hygiene during this period to avoid such blood flowing out of the vulva. When the bleeding exceeds 7 days, you need to go to the hospital for ultrasound examination or endocrine hormone test, and take oral anti-inflammatory drugs and hemostatic drugs to help stop the bleeding, otherwise prolonged bleeding may cause endometrial inflammation, tubal inflammation and pelvic inflammation. Because this bleeding can cause delayed menstruation, it must be observed, and when it is delayed for a long time, you need to exclude yourself from conception, because the contraceptive pill is not 100% contraceptive and there is a chance of failure.