Frequent urination and lumbar pain may be related to kidney-related pathology, and it is recommended to go to the hospital for further examination to clarify the specific causes of common diseases as follows: 1. It is recommended to go to the hospital for urine routine and urine culture examination, and blood test to further assist in the diagnosis; 2. Kidney stone: it can cause lumbar pain and accompanied by urinary frequency, hematuria and other symptoms, because the stone is obstructed in the ureteral connection of the renal pelvis causing hydronephrosis, so the general lumbar pain is relatively intense, and need to carry out ultrasound examination of the urinary system to exclude whether there are stone lesions.