The cause of lower abdominal pain is usually gynecological inflammation, etc., but the cause should be determined based on a combination of abdominal pain location and medical history and signs. Lower abdominal pain usually requires different common causes depending on the specific site of pain. For example, lower abdominal pain on the left side can be caused by left tubal inflammation, left tubal pus, left ovarian cyst, left chocolate cyst, left corpus luteum rupture, etc.; lower abdominal pain on the right side can be caused by right tubal inflammation, right tubal pus, right ovarian cyst, right chocolate cyst, right corpus luteum rupture, appendicitis, etc.; abdominal pain under the umbilicus can be caused by endometritis, dysmenorrhea, etc., or intestinal inflammation, intestinal obstruction, or cold in the abdomen, or unclean diet, etc. or unclean diet, etc. For example, menopause with vaginal bleeding may be due to pre-eclampsia or ectopic pregnancy; if lower abdominal pain is accompanied by fever, it may be due to pelvic inflammatory disease or appendicitis; if lower abdominal pain is accompanied by mass, it may be due to ovarian tumor or ovarian cyst torsion; if abdominal pain during menstruation, it may be due to dysmenorrhea; if abdominal pain in the middle of menstruation, it may be due to ovulation pain. In conclusion, there are many causes of lower abdominal pain, which may be gynecological diseases or surgical diseases, and need to be combined with medical history, physical signs and relevant examinations to confirm the diagnosis.