Pain below the left side of the navel in women can be caused by the following more common causes: 1, rectal and sigmoid lesions, such as erosion of the intestinal mucosa, ulcers, polyps, and even malignant tumors, can cause distension and discomfort in the lower left abdomen; 2, patients with long-term constipation can also cause discomfort in the lower left abdomen; 3, urinary tract infections, that is, urinary tract infections, in addition to pain in the lower left abdomen, there will be frequent urination, painful urination, urethra In addition to pain in the lower left abdomen, there will be symptoms such as frequent urination, painful urination and burning in the urethra, and serious patients will also be accompanied by fever; 4. The above is only a general description of the causes, clinical diagnosis requires further examination.