If a woman suddenly develops small stomach pain, there are several causes from the gynecological point of view: first, ovarian cyst tip torsion, due to pathological cysts in the ovary, the weight of the relationship can lead to a twisting of the tip, there will be a sudden lower abdominal pain. It is also clinically associated with nausea and vomiting. It is recommended to go to the hospital as soon as possible to give the appropriate treatment. Secondly, if there is a history of menopause and sudden stomach pain, it may be caused by ectopic pregnancy. It is recommended to combine clinical history with laboratory tests and blood HCG for comprehensive analysis. The third one is caused by pre-eclampsia, provided that there is a history of menopause. The preliminary diagnosis can be made by ultrasound examination, blood HCG and progesterone test, and if you want to continue the pregnancy, you should be given antiretroviral treatment. Fourth, if there is a sudden pain in the stomach, it may also be caused by ureteral stones or pelvic inflammatory disease, and it is recommended to combine clinical history and gynecological examination to give a comprehensive analysis.