Taking emergency contraceptive pills can lead to abnormal uterine bleeding, because emergency contraceptive pills are a kind of hormonal drugs, after stopping the pills will cause withdrawal bleeding, but the amount of bleeding will not be too much, which is a sign of the success of contraception. Women should relax, temporarily give observation, can not be tired, if the bleeding time is too long, you can take oral medication for symptomatic treatment, you can give medication to stop bleeding orally, oral adrenal chromium or uterine blood ning capsule and so on. Although the emergency contraceptive pill can be used for contraception, but can not be taken regularly. Women should not take the pill more than three times a year, otherwise it will cause endocrine dysfunction, resulting in abnormal menstruation. Women can take other contraceptive measures, such as intrauterine devices, condoms and other methods of contraception.