There are several possible causes of back pain and stomach pain: first, diseases of the urinary system, when the kidney has stones walking downward, stuck in the ureteral stenosis, there can be back pain, then there can be reflexive pain in the abdomen, then the relevant urography and ultrasound examination, urinalysis, for early diagnosis and treatment; second, diseases of the pelvis, when the pelvis has tumors or Second, pelvic diseases, when the pelvic tumor or pelvic inflammatory disease, pelvic effusion, can appear lumbago, at the same time can appear small abdominal pain, can be accompanied by small abdominal cramping, then we should carry out pelvic ultrasound, CT, nuclear magnetic examination for early diagnosis and treatment, if necessary, physical therapy or oral drug treatment.