The phenomenon of lumbar soreness and pain in the lower abdomen is relatively common in clinical practice, and the main causes include the following: 1. It is possible that stones in the urinary system, including renal pelvis or ureteral stones, may occur in this situation. This is a condition that can be diagnosed through urine routine and ultrasound of the abdomen and urinary tract, and the specific cause of the pain can be found. 2, for women, it is more common due to inflammation of the pelvic cavity of the uterus, including acute and chronic pelvic inflammatory disease, pelvic effusion, etc, The actual pelvic effusion can cause lower abdominal swelling and soreness. Therefore, the symptoms of the lower abdomen must go to a regular hospital for a detailed examination to find the exact cause, and according to the cause for systematic and standardized treatment.