The causes of lower left abdominal pain may be related to physiological factors, or may be caused by gynecological diseases or gastrointestinal diseases. 1. Physiological factors: common in early pregnancy, pregnant women’s ovaries may appear cysts phenomenon, some pregnant women may also appear ovarian corpus luteum cysts, which may cause pain in the lower left abdomen. In addition, in the later stages of pregnancy, along with the development and growth of the fetus, the uterus will continue to form a stretching effect, thus causing pain in the lower left abdomen. These are all physiological factors and do not require special treatment. 2. Gynecological diseases: commonly seen in left adnexitis, left ovarian tumor, pelvic inflammatory disease, uterine inflammation, etc., which may lead to women’s left lower abdominal pain, and may be accompanied by abnormal leukorrhea, vaginal bleeding and other manifestations. 3. Gastrointestinal diseases: commonly seen in sigmoiditis, ulcerative colitis, infectious colitis, etc., due to the stimulation of inflammation, may cause hidden pain in the lower left abdomen, may also be accompanied by abdominal pain, diarrhea and other symptoms. There may also be other causes of pain in the lower left side of the abdomen. If the symptoms continue to be unrelieved, it is recommended to seek medical advice as soon as possible, and after diagnosis, standardized treatment under the guidance of a doctor.