The main reasons for the pain in the belly after intercourse are as follows: 1. It may be caused by excessive force on the uterus during intercourse, resulting in contact pain, which is basically nothing to worry about and can be rested for a few days. The main reason for the pain is the following: 1) it may be caused by excessive force during intercourse, which may lead to pelvic congestion and abdominal pain. 2) it may also be caused by gynecological diseases, such as chronic pelvic inflammatory disease and endometriosis, which may lead to abdominal pain during intercourse. 3) it may also be caused by other physical diseases, such as gastrointestinal diseases, which may cause pain during intercourse. If the disease reaction is serious and cannot be relieved, it is recommended to go to the hospital in time for examination to confirm the diagnosis of the disease, it is best not to take drugs blindly, but need to be treated according to the cause of the disease.