The right side of the stomach with right side back pain may have the following causes: first, kidney stones, when kidney stones travel down through the ureter and get stuck in the ureteral stenosis, right side back pain can occur, this pain is colic, can be paroxysmal intensification, at the same time can reflexively appear right side of the abdomen pain, at this time to carry out relevant urine laboratory tests and urological ultrasound, imaging examination, to carry out early diagnosis and treatment; second, pelvic tumor, when the pelvic side of the tumor can appear one side of the back pain, accompanied by symptoms of small abdominal pain. Second, pelvic tumor, when there is a tumor on one side of the pelvis, there can be back pain on one side, accompanied by stomach pain, often pain in the small abdomen, then we need to perform ultrasound, CT and MRI of the pelvis for early diagnosis and treatment.