Adolescent girls need to know how to “make amends after the fact” For adolescent girls, avoiding sex is the most fundamental measure to avoid risk. Teenage girls are curious and adventurous during adolescence, and rarely consider the consequences of sex. Once pregnant, whether to give birth to the child or abortion, are extremely unfavorable to the physical and mental health. Parents should pay attention to their children’s abnormal performance, timely sex education, to avoid premature sexual behavior to harm them. Among underage girls, in addition to not knowing about the emergency morning-after pill,, there is a significant portion of the abuse of this drug. “Popularizing knowledge about emergency contraceptive pills is very necessary for underage girls. Because both ignorance and misuse can cause great harm to them physically and mentally.” Emergency contraception is a method of contraception used to prevent pregnancy for a period of time after unprotected sex or contraceptive failure, with the pill being the most commonly used method. The main over-the-counter emergency contraceptives available over the counter are Yutex, Mifepristone tablets, Paustin and Noxzema. Yuketin, Prostin and Norethindrone are all taken in the same way: the first tablet is taken within 72 hours of intercourse, and the second tablet is taken 12 hours later. Mifepristone, on the other hand, is taken as follows: one tablet on an empty stomach within 72 hours of intercourse, followed by a 2-hour fast. It can also be used in combination with prostaglandin analogs under a doctor’s supervision to terminate a pregnancy within 49 days of menopause. However, as the hormonal content of emergency contraceptive pills is much higher than that of short-acting contraceptive pills, it has a significant impact on the menstrual cycle, and can also increase a woman’s mental stress level as well as the chances of ectopic pregnancy, causing irregular vaginal bleeding, etc. Therefore, this type of medication must not be abused, with a maximum of 2 tablets a month.