Hidden pain in the lower part of the left abdomen has more causes, which may be related to digestive system factors, ureteral stones, gynecological diseases and so on. 1. Digestive system factors: Hidden pain in the lower part of the left abdomen may be caused by ulcerative colitis, intestinal polyps, colon cancer, fecal stimulation and other digestive system factors. 2. Ureteral stones: after suffering from ureteral stones, the typical symptom is severe abdominal cramps, but mild cases may also lead to the emergence of vague pain in the lower part of the left abdomen. 3. Gynecological diseases: If you suffer from certain gynecological diseases, such as left tubal cysts, tubalitis, ectopic pregnancy, pelvic inflammatory disease, etc., it may also cause symptoms of vague pain in the lower left abdomen. Can cause the left side of the lower part of the abdomen hidden pain causes more, it is recommended to go to the hospital in a timely manner, after the relevant project examination, under the guidance of professional doctors to clarify the cause of the disease, and timely standardized treatment.