If a woman has pain in the left lower abdomen, the first cause that comes to mind may be inflammation, such as left tubal inflammation, left ovarian inflammation, left tubo-ovarian abscess, acute pelvic inflammatory disease, or acute attack of chronic pelvic inflammatory disease. If in the middle of menstruation, it is also important to consider the symptoms of lower abdominal pain due to rupture of the corpus luteum. In addition, if there is a sudden change of movement during activity and lower abdominal pain with nausea and vomiting, the possibility of ovarian cyst tip torsion cannot be excluded. In addition to some diseases related to gynecology, it should also be considered as caused by diseases related to the intestinal tract, such as acute and chronic colitis, acute gastrointestinal inflammation, intestinal obstruction, strangulated inguinal hernia, etc., which can cause symptoms of left lower abdominal pain. The possibility of intestinal adhesions cannot be ruled out if some intra-abdominal surgery has been performed in the past.