Women will have pain when pressing below the navel. If accompanied by abdominal pain, diarrhea, abnormal stool, nausea, vomiting and other symptoms, consider the possibility of gastroenteritis. If accompanied by frequent urination, urinary urgency, urinary pain, fever, lumbago, consider the possibility of acute cystitis, acute urethritis. Acute pelvic inflammatory disease can also cause lower abdominal swelling, which worsens after sexual intercourse and around menstruation. If the pain is prolonged, it is recommended to go to the hospital for further improvement of gynecological ultrasonography, urine routine, stool routine and other tests.