This condition is mainly caused by lesions such as urethral strictures, urethral polyps and urethral valves, as well as bladder neck contracture and urinary retention in older men with prostate enlargement, which can cause dripping at the end of urination. The main reason is that at the initial stage of urination due to the pressure in the bladder, urine will pass smoothly through the urethra as the pressure of urination decreases, due to the basic situation of having urethral stricture or urethral pressure is relatively tight, the flow rate of urine will decrease due to the decrease in pressure, and eventually there will be part of the urine remaining in the urethra, which will gradually be part of the urine remaining with the contraction of the bladder and the closure of the urethra. It will be gradually squeezed out of the body with the contraction of the bladder and the closure of the urethra, and the phenomenon of urethral dripping will also occur. When this occurs, it is recommended that the patient have a urethrogram or cystoscopy performed to clarify what is causing the condition.