It is recommended to go to the hospital for relevant examinations to clarify the possible causes: 1. Infection of the urinary system. For example, pyelonephritis, which can be accompanied by lumbar pain, urinary distension, urinary urgency, urinary frequency, or an increase in body temperature, it is recommended that further urine culture tests and routine urine tests be performed to clarify the presence of infection. 2. Stones in the urinary system. For example, kidney stones or ureteral stones, which can be accompanied by back pain, urinary distension, urinary frequency, urinary urgency, and in severe cases, hematuria, sometimes the pain is severe and often unbearable. This is often seen in elderly patients, such as kidney tumors, bladder tumors, etc., which can present with back pain, urinary distension, and also symptoms of hematuria, which need to be ruled out by CT or cystoscopy of the urinary system.