The elderly can not urinate is divided into the following main cases: the first, anuric state, the reasons include heart failure, renal failure, insufficient intake, etc., the need to use cardiac drugs, drugs to improve renal perfusion, appropriate to increase the effective blood volume, such as drinking more water, but, generally encountered in this case need to go to the hospital for specialist treatment. The second, common cause is urinary tract obstruction, including ureteral stones, tumors, hydronephrosis, etc. The most common cause in male patients is prostatic hyperplasia, which requires the removal of the cause of obstruction and the use of drugs that dilate the urethra, such as tamsulosin. Male patients with acute urinary retention can go to the bathroom and turn on the tap, apply heat to the bladder area induced by the sound of running water, maintain a standing position, relax the mood and urinate. If it still does not work, you need to go to the hospital immediately for treatment such as catheterization. Thirdly, if it is a female patient, it is mostly due to the disease of the pelvic floor, and it is better to start with catheterization, pelvic floor and rehabilitation functional exercises, or pelvic floor reconstruction surgery treatment to restore normal urinary function.