Possible causes of lower abdominal pain with hematuria in women: First, urinary stones, such as ureteral stones or bladder stones, can cause pain in the lower abdomen when obstructed, and the pain can radiate to the waist, and can be accompanied by hematuria in the naked eye. Ultrasound examination of the urinary system is needed to further rule out the presence of stones; secondly, tumors of the bladder or ureter can cause lower abdominal pain accompanied by hematuria. Especially ureteral tumors that cause ureteral obstruction can cause abdominal pain and back pain due to fluid accumulation in the kidney. In the blood urine excreted, there may be stripes or worm-like blood clots, which need to be further ruled out by CT examination of the urinary system. Third, suffering from acute infections of the urinary tract, such as cystitis, urethritis, ureteral inflammation, etc., can lead to lower abdominal pain accompanied by hematuria. Usually accompanied by painful urination, or with fever and other symptoms, urine culture examination is needed to further exclude the presence of infection; fourth, abdominal pain with hematuria can also occur when lesions of other abdominal systems involve the bladder or ureter. For example, septic appendicitis involving the bladder or ureter can cause microscopic hematuria with lower abdominal pain, fever and diarrhea. Further ultrasound examination of the relevant area is needed to rule out.