There may be several reasons for the simultaneous appearance of abdominal pain and low back pain: first, gynecological diseases, when there is pelvic inflammatory disease, pelvic effusion and pelvic tumor, there can be low back pain accompanied by pain in the small abdomen, often with a feeling of abdominal cramping. When the kidney stone travels down through the ureter and gets stuck in the ureteral stenosis, it can cause low back pain, which is colic pain and can be intensified in paroxysms, and at the same time, it can reflexively cause pain in the small abdomen.