If the elderly do not urinate, they need to go to the hospital for further examination to clarify the specific causes of symptomatic treatment: 1. If the examination reveals acute renal failure, dialysis treatment should be given if necessary to eliminate excess toxins and water in the body through dialysis to maintain the body’s water-electrolyte metabolism, and then further examine the causes of renal failure, such as renal renal failure, glomerulonephritis or ischemia of the kidneys, etc. The kidneys are not producing urine due to the decrease in filtration, so we can treat the specific cause and stop dialysis treatment after the kidney function is restored. 2, because of diseases such as prostatic hyperplasia in elderly men or pelvic floor organ prolapse in women, the urine produced in the kidneys accumulates in the bladder but cannot be excreted through normal urination. For example, in men with prostatic hyperplasia, surgery is needed to restore good patency, and in women with pelvic floor organ prolapse and bladder prolapse resulting in anuria, pelvic floor reconstruction surgery is needed to restore normal urination.