Pelvic inflammatory disease can cause stomach pain, and stomach pain is one of the main clinical symptoms of pelvic inflammatory disease. Patients mainly present with pain in the middle or both sides of the lower abdomen, or the entire lower abdomen. Patients will also have clinical symptoms of infection such as lower abdomen, lumbago, increased vaginal discharge, and fever. During gynecological examination, there may be pressure pain in the uterine body and thickening and pressure pain in the bilateral adnexal area. At the same time, a large amount of purulent discharge can be observed, which collects at the cervical opening. But pelvic inflammatory disease is not the only cause of abdominal pain in women. It can also occur when a woman has gastrointestinal disorders, inflammatory diseases, diseases of the urinary system, or diseases of the liver or gallbladder. In this case, the abdominal pain may be accompanied by clinical symptoms in the corresponding area, such as increased gas, diarrhea, nausea and other clinical manifestations in the case of gastrointestinal disorders.