Patients have small stomach pain during sex, usually there are two cases: 1, the most common is gynecological pelvic inflammation, such as endometritis, adnexitis, also known as pelvic inflammatory disease, which can cause couples to have sex when the patient’s small tummy ache, and the severity of the inflammation, but also led to the severity of the abdominal pain; 2, that is, the uncommon, such as ectopic pregnancy, abdominal cavity with blood accumulation when the patient during sex will also feel the stomach pain, this is relatively rare. So the small stomach pain during sex, preliminary consideration is caused by gynecological pelvic inflammatory disease, need to go to the hospital to do ultrasound, plus internal examination can be diagnosed.