Lower back pain accompanied by lower abdominal pain may have the following reasons: First, stones, when there are kidney stones down through the ureter, in the ureteral stenosis stuck, there can be lower back pain, which is often lumbar colic, for the paroxysmal aggravation, and at the same time can be reflexive abdominal pain, this time we have to carry out the ultrasound of the urinary tract and imaging to diagnose, if necessary, for lithotripsy treatment. Secondly, pelvic diseases, when pelvic effusion or pelvic inflammatory disease occurs in the pelvis, lumbar pain can also occur accompanied by pain in the lower abdomen, at this time we have to carry out pelvic CT, ultrasound to make a diagnosis. Thirdly, pelvic tumor, when there is a tumor in the pelvis, there can also be back pain accompanied by lower abdominal pain, and then we have to carry out the relevant nuclear magnetic examination for diagnosis and treatment.