Many married women reflect that they always feel abdominal pain after sex and do not know what is going on, so why do women have stomach pain after sex and what exactly is the cause? Normal pain during sexual intercourse During sexual intercourse, as the male penis pumping will produce intense stimulation of the female vagina, abdominal cavity and pelvic organs, women can experience shortness of breath and involuntary contraction of the entire body, these can cause pain. However, the pain often manifests itself after intercourse because sexual excitement masks the pain. This is the most common situation. This post-coital abdominal pain is tolerable and resolves on its own. Female physiology The base of the female urethra and bladder is close to the vagina, and the uterus and adnexa are more closely related to the vagina, making them vulnerable to external pressure and biological factors of irritation. When the sexual organs are engorged with blood, the pelvic tissues undergo varying degrees of stress and contraction or spasm, causing abdominal pain. This occurs mostly in people who have sexual intercourse for the first time and can be gradually reduced later. Female pelvic inflammatory disease If the female partner has a lesion due to the abdominal cavity or pelvis itself, the penis will cause abdominal pain when it impacts on the area with the lesion. Pelvic inflammatory diseases such as vaginitis, cervicitis, and pelvic inflammatory disease can cause constant pain in the lower abdomen of women and exacerbate the symptoms due to local irritation and congestion caused by sexual intercourse. This pathological symptom is easily distinguished from the previous ones in that the pain will last for a long time and will not be relieved with the end of sexual intercourse. A gynecological examination at a hospital can also clarify the cause. If sex lasts too long, the lasting sexual urge can lead to prolonged pelvic congestion, which may also cause abdominal pain in women with pelvic stasis syndrome. Changing the position during sex, such as switching to a side lying position, will facilitate the flow of pelvic blood and thus relieve the symptoms. Sudden rupture of the corpus luteum If there is sudden and severe abdominal pain, it may be caused by rupture of the corpus luteum. Mature follicles and corpus luteum can suddenly rupture after being squeezed or vibrated, causing severe abdominal pain or abdominal bleeding. This condition requires prompt medical attention. Prostaglandin stimulation Pain during intercourse in pregnant women is mostly caused by semen. Since the prostaglandins in semen can cause uterine contractions in women, especially those who are pregnant, this can not only cause abdominal pain, but may even cause premature delivery and miscarriage. Therefore, it is important to abstain from intercourse during pregnancy. Allergic abdominal pain Some women are allergic to men’s semen or condoms, causing systemic allergies and allergic abdominal pain, changing the method of contraception will make abdominal pain no longer occur. Some people get cold after intercourse, such as blowing electric fans, can also experience paroxysmal abdominal pain in the lower abdomen. Inappropriate force position The male partner is too rough during intercourse, will make the female abdominal pressure suddenly rise, the uterus, rectum, bladder squeezed by gravity, the intestinal canal reverse peristalsis and cause abdominal pain. If the female upper position, the uterus, adnexa and other organs are prone to position changes and pulling on the surrounding tissues, resulting in lower abdominal and lumbar pain. This pain will generally disappear on its own with the end of sexual life.