When back pain or lower back pain occurs while holding urine, the presence of retrograde entry of urine from the bladder into the ureter and reflux toward the kidneys is considered. This is often seen with enlargement of the ureteral orifice, loss of bladder function, inflammation of the ureteral orifice, and rigidity. Further departmental urography and performance of cystoscopy are recommended for clarification. When urine is held in the bladder, it increases the pressure in the bladder. Usually, when the pressure in the bladder increases, the urine does not enter the ureter and return to the kidneys. When the ureter is dilated or the bladder’s forced urethral muscle is relaxed due to various diseases, this is when urine enters the ureter retrogradely and refluxes to the kidneys. When refluxing urine occurs in the kidneys, high pressure in the renal pelvis occurs, and then the patient may experience back pain or lumbago. Men are often seen in prostatic hyperplasia or prostatitis, women are often seen in neurogenic bladder, pelvic organ prolapse resulting in excessive residual urine and other diseases, but also in ureteral infectious diseases, bladder infectious diseases, it is recommended that further examination to the cause of the treatment.