Low back pain with abdominal pain can be caused by the following reasons: first, urinary stones, when the kidney has stones downward, stuck in the ureteral stenosis, there can be low back pain, accompanied by radioactive pain in the abdomen, can be accompanied by hematuria and proteinuria, then early examination of the kidney CT, ultrasound and urine tests, to early diagnosis and early treatment. Second, gynecological diseases, when the pelvis has pelvic inflammatory disease or pelvic stones, can also appear lumbago, accompanied by pain in the small abdomen, then there can be a feeling of abdominal cramping, early examination of pelvic ultrasound and pelvic CT, if necessary, pelvic MRI, to early diagnosis and early treatment.