Holding back urine back pain may be caused by holding back too much urine, but also may be caused by urinary system diseases, such as neurogenic bladder, prostate hyperplasia and so on. If holding urine too much, more than the pressure of the valve at the opening of the ureter, it is easy to cause urine reflux caused by bilateral back pain, not holding urine after this back pain will have significant improvement. Patients with neurogenic bladder, prostate hyperplasia can lead to the destruction of the ureteral anti-reflux mechanism, holding urine, with the increase of urine in the bladder to a certain extent, can appear the phenomenon of urine reflux, resulting in bilateral hydronephrosis, the appearance of bilateral low back pain, and in severe cases, leading to impaired renal function, and even cause uremia. The appearance of back pain after holding urine, if there is no improvement for a long time, you need to go further to the urology department of the hospital for consultation and examination and then give treatment.