The pain in the stomach after intercourse may be caused by physiological reasons or pathological reasons, which may be triggered by gynecological diseases, chronic prostatitis, epididymitis, testicular torsion, etc. The pain in the stomach after intercourse may be caused by physiological reasons or pathological reasons. 1. Physiological reasons: if the emotions during the coitus have been in a state of excessive tension, it will lead to the abdominal wall muscles become tense, the gastrointestinal tract spasms and the pelvic cavity inside the blood vessels overfilling the situation, which may lead to abdominal pain after coitus. 2. Pathological reasons: If the phenomenon is frequent, it may be caused by gynecological diseases, such as pelvic inflammatory disease, endometriosis and cervicitis, etc.; men who suffer from chronic prostatitis, epididymitis, etc. can also lead to abdominal pain after intercourse, and testicular torsion can also cause this situation. The pain in the stomach after coitus may also be caused by other factors, if the phenomenon is occasional, it is recommended that you can not do special treatment for the time being. If the symptoms occur frequently, it is recommended to go to the regular hospital with the doctor to complete the relevant examinations to confirm the cause.