Belly pain after intercourse, mainly consider the following two major causes: first, general gynecological diseases, such as pelvic inflammatory diseases, adenomyosis, etc., these diseases will lead to pelvic congestion, edema or adhesion. So after intercourse, due to mechanical stimulation or pulling, it will lead to localized pain and discomfort. It needs to be clearly diagnosed through gynecological internal examination, gynecological ultrasound, CA125 and other related examinations. Secondly, it should be considered as gynecological acute abdomen, such as rupture of ectopic pregnancy, rupture of corpus luteum cyst or torsion of ovarian cyst, etc. This kind of pain is usually very severe, which is not tolerated by the patient, and may be accompanied by bleeding or nausea, vomiting and other clinical manifestations, which need to be timely to the hospital. Gynecological ultrasound, blood chorionic gonadotropin, blood routine and other related tests are needed to make a clear diagnosis.