Women who take the emergency contraceptive pill experience bleeding, known as withdrawal bleeding. The emergency contraceptive pill is clinically a highly effective progestin, and after taking it, it can cause suppression of ovulation in women, and the hormone level in the body, from the peak, drops abruptly. As the endometrium loses hormonal support, partial or complete shedding occurs, resulting in vaginal bleeding symptoms. However, after vaginal bleeding, it is also necessary to consider whether it is caused by other reasons, such as gynecological inflammation, bleeding after intercourse, ectopic pregnancy, or pre-eclampsia, etc. If the amount of bleeding is high or accompanied by obvious abdominal pain, it is recommended to go to the hospital and be examined in time. The emergency contraceptive pill can have certain effects on women’s bodies, so it is recommended not to take it for a long time and to choose other forms of contraception, and the emergency contraceptive pill can easily bring women more side effects, such as nausea, vomiting, etc.