Clinical symptoms of posterior lumbar distension and pain: First, consider digestive system diseases. When gallstone disease is complicated by acute cholecystitis, this symptom can appear, and the patient will also experience right upper abdominal cramps, nausea, vomiting and other symptoms; if complicated by acute obstructive cholangitis, fever, jaundice and other symptoms will also appear; acute pancreatitis and pancreatic cancer can also appear this symptom; inflammatory diseases of the intestinal tract Inflammatory diseases of the intestine, such as chronic colitis, ulcerative colitis, and Crohn’s disease, can also have similar symptoms. Second, consider whether there are any urinary system diseases, such as chronic pyelonephritis, kidney tumors, kidney stones, ureteral stones, all of which can cause pain in the back. Third, consider gynecological diseases, such as pelvic inflammatory disease and adnexitis, pelvic malignant tumor, and even ectopic pregnancy and rupture, can also appear this symptom. Therefore, it is recommended to seek medical attention and conduct the necessary tests to clarify the diagnosis.