It is possible that the tummy ache may be caused by intense sexual intercourse and large movements, or by gynecological inflammation, especially cervicitis and pelvic inflammatory disease, which can lead to tummy ache when having intercourse. If you are really pregnant, have sex in early pregnancy, weak women, or have symptoms of pre-eclampsia, you can go to the hospital for a checkup to see if you are pregnant, and it is recommended to have a blood test for chorionic gonadotropin values to be more accurate. If you are not pregnant, you can apply hot compresses to the lower abdomen and do not eat cold food, it will get better on its own. If it does not get better, or if the leucorrhea is not normal, you need to check whether there is really gynecological inflammation. If you are suffering from pelvic inflammatory disease, you need to apply drugs for treatment under the guidance of your doctor. At the same time, pay attention to hot compresses on the lower abdomen, which can promote pelvic blood circulation and promote the absorption and dissipation of inflammation.