The pain caused by the first abortion varies from person to person because of the different methods of abortion and the different pain thresholds of each person. Abortion can be divided into two methods: surgical abortion and medication abortion. The commonly used methods are negative pressure suction, forceful scraping abortion, medicinal abortion and painless abortion. 1, negative pressure suction: the use of negative pressure suction, the endometrial adhesion of the embryonic tissue and mucosa tissue suction out, in the process of operation force pulling, may hurt the local muscle tissue and nerves, resulting in tear-like pain. At the same time, the negative pressure stimulates the endometrium, the uterus will produce spasmodic contractions, resulting in abdominal pain, similar to childbirth pain; 2, clamp scraping abortion: generally is a combination of clamping and negative pressure suction surgical method to terminate pregnancy, generally advocated within 14 weeks of pregnancy, mainly pulling pain and uterine contraction pain, pain is more obvious, in recent years, due to the clinical application of mifepristone, misoprostol, clamp scraping is gradually replaced by drugs The pain is also caused by the contraction of the uterus when the embryo dies and the tissue is dislodged, thus expelling the embryonic tissue and the meconium, and most people can tolerate this degree of pain. However, after the operation, due to the contraction of the uterus, it will cause abdominal pain with vaginal bleeding, similar to dysmenorrhea. To avoid the pain and other discomfort caused by abortion, if a woman does not plan to have children, it is recommended to take effective contraceptive measures when having sex to avoid the risk.