After taking the emergency contraceptive pill, menstruation is not clean for many days, considering that it is related to endocrine disorders, pregnancy-related diseases, etc., and the treatment should be based on the cause of the disease through medication, surgery and other ways of treatment. 1. Endocrine disorders: because the emergency contraceptive pill is a synthetic estrogen-progestin preparation, through the inhibition of ovarian function and thus inhibit ovulation to play the role of contraception, after taking the drug may lead to hormone level disorders and prolongation of menstrual disorders such as menstruation, at this time you can follow the doctor’s instructions to use Yunnan Baiyao capsules symptomatic treatment, if the endometrial echogenicity of the uterus has anomalies, if necessary, need to carry out diagnostic scraping. 2. Pregnancy-related diseases: after taking emergency contraceptive pills may also lead to contraceptive failure, if a woman has an unplanned pregnancy, a priori miscarriage, ectopic pregnancy and other adverse pregnancy conditions, there will be irregular vaginal bleeding, if it is determined to be intrauterine pregnancy, it is recommended to terminate the pregnancy through abortion, if ectopic pregnancy, the drug can kill the embryo conservative treatment or surgical treatment. For women who do not have their period for many days after taking the emergency contraceptive pill, it is recommended that they go to the gynecology department of a regular hospital, complete the blood HCG, ultrasound and other relevant examinations, and then take active treatment under the guidance of the doctor after clarifying the cause of the disease.