Lower abdominal pain should be judged according to the location of the pain and medical history, and is common in the following areas: if the left side of the lower abdomen is painful and uncomfortable, the possible causes are: left-sided tubitis, left-sided tubal pus, left-sided ectopic pregnancy, left-sided ovarian cyst, left-sided corpus luteum rupture, left-sided ovarian cyst tibial torsion, etc. Pain and discomfort in the right lower abdomen are commonly associated with right-sided tubal infection, right-sided tubal pus, right-sided ectopic pregnancy, right-sided ovarian cyst, right-sided ruptured corpus luteum, right-sided ovarian cyst torsion, appendicitis, etc. The causes of lower abdominal (subumbilical) pain and discomfort include: endometritis, dysmenorrhea, endometriosis, uterine fibroids, pre-eclampsia, enteritis, intestinal obstruction, etc. In short, there are many causes of lower abdominal pain, which can be caused by various gynecological diseases, such as pelvic inflammatory disease, dysmenorrhea, pregnancy-related diseases, uterine fibroids, ovarian cysts, ovulation pain, endometriosis and pelvic masses, etc. It can also be caused by medical and surgical diseases such as appendicitis or intestinal diseases, such as enteritis or intestinal obstruction, etc. It needs to be combined with medical history and relevant examinations, such as ultrasound or pelvic CT or abdominal films, etc. It is recommended to go to the hospital in time to identify the cause to avoid delaying the disease.