If a woman is married or has a history of sexual intercourse and has pain in her belly and anal pain, a blood HCG test and ultrasound is required to rule out the possibility of ectopic pregnancy. If an unmarried woman with no history of sexual intercourse has pain in her belly and anus, ultrasound examination is recommended to rule out the possibility of luteal rupture. If this symptom occurs, it is also necessary to exclude the possibility of pelvic inflammatory disease. When there is inflammation in the pelvis, it can lead to a large amount of exudation, and the exudate will flow into the rectal trap of the uterus, causing pain in the lower abdomen and causing anal cramping. You can do gynecological examination, ultrasound examination, routine blood tests, mainly to understand whether there is pressure pain in the pelvic cavity of the uterine adnexa, through ultrasound examination to understand whether there is exudation in the pelvic cavity, and actively give anti-inflammatory treatment.