Contraceptive pills all contain hormones, so it is possible to cause bleeding after taking or stopping the pill. If a patient bleeds on the fifth day after taking emergency contraceptive pills, this may be withdrawal bleeding, due to the endometrium losing hormonal protection after the drug stops all of a sudden, which leads to the shedding of the endometrium causing bleeding. If the bleeding is very small and clears in two to three days, it does not require special treatment and can continue to be observed. If the amount of bleeding is very heavy and similar to the amount of menstruation, treat it as a menstrual period and then observe the situation of the following periods. If bleeding occurs on the fifth day of taking short-acting contraceptive pills, it may be a side effect of the pills, so don’t stop taking the pills, but continue to take them.