A small amount of vaginal bleeding usually occurs about 5 days after taking the emergency contraceptive pill, but not all patients will have vaginal bleeding after taking it. Vaginal bleeding occurs because the hormone level in the body temporarily increases after taking the emergency contraceptive pill, and the hormone in the body decreases after the metabolism of the drug is finished, causing a small amount of withdrawal bleeding from the endometrium, which is also a common side effect after taking the emergency contraceptive pill. In general, the bleeding time is short and the amount is small, so there is no need to take hemostatic drugs to deal with it. The main component of the emergency contraceptive pill is progestin, which is often used to prevent the occurrence of unwanted pregnancy, and is usually taken within 72 hours after sexual intercourse. If there is no plan to get pregnant, it is recommended to take safe and effective contraceptive measures, such as condoms, intrauterine devices, oral short-acting contraceptive pills, etc.