Usually it is difficult for abdominal pain and back pain to appear at the same time, if they appear at the same time, it may be due to the following reasons: 1. So there is a lumbar sprain or lumbar muscle strain, and when there is a large change in position such as getting up, lying down, etc., abdominal pain and back pain may occur, and special attention should be paid to whether there is a compression fracture or lumbar spine injury; 2, pain may be the pain of the abdomen itself, such as a tumor in the kidney located in the retroperitoneum, ureter or kidney with stones, tuberculosis, etc., there will be pain in the deeper part of the small abdomen; 3 When pelvic inflammatory disease occurs, especially in women with tubal inflammation, it will also cause pain in the small abdomen and back pain. This should be combined with relevant tests, such as increased leucorrhea and pain in the abdomen, to confirm the diagnosis.