The first is to consider the possibility of pelvic inflammatory disease, need to go to the hospital as soon as possible, check the gynecological ultrasound and gynecological examination. If it is caused by pelvic inflammatory disease, you need to take oral antibiotic medication, the choice of cephalosporin antibiotics combined with metronidazole antibiotics treatment. The first thing you need to do is to pay attention to rest, avoid strenuous exercise, prohibit sexual intercourse, prohibit the consumption of spicy and stimulating food, pay attention to heat preservation, do not get cold and cold. Secondly, in patients with ovarian cysts, if the stomach has been experiencing lower abdominal pain after intercourse, it may be an ovarian cyst with torsion, which requires further gynecological examination as well as gynecological ultrasound for clear diagnosis, and if necessary, surgery can be considered. Thirdly, if the corpus luteum ruptures or ectopic pregnancy is possible, further examination of gynecological ultrasound, gynecological examination and blood HCG value is needed to decide the next step according to the examination.