There is a desire to urinate but no urine, consider with urethritis, cystitis, prostatitis, ureteral end stone and other diseases, need to go to the hospital for further examination to clarify the cause of the disease, and timely consultation. 1. Urethritis: It is generally due to the mucous membrane in the urethra being stimulated by inflammatory mediators, leading to inflammatory infection of the urinary tract, thus causing the phenomenon of having the desire to urinate but not urinating. Urethritis may present with symptoms such as frequent urination and urgency. 2. Cystitis: usually due to the bladder mucosa is stimulated by pathogenic bacteria, so that its sensitivity increases, thus causing the phenomenon of having the desire to urinate but no urine. Cystitis usually presents with symptoms such as painful urination and discomfort in urination. 3. Prostatitis: It may be due to the enlargement of the prostate gland after being stimulated by inflammation, which presses the urethra, and then there is the phenomenon of having the desire to urinate but no urine. 4. Ureteral end stones: patients with ureteral end stones can have symptoms of lower back and abdominal pain under the stimulation of the stone, sometimes colic-like episodes, at the same time, there will also be frequent urination, urinary urgency, urination, but the phenomenon of no urine. If the phenomenon of having the urge to urinate but no urine, it may also be related to other factors such as prostate hyperplasia, urethral stricture, etc., you should go to the regular hospital in time for consultation and treatment, and strive for a speedy recovery.