Holding urine for a long time slows down urination, which may be a normal physiological phenomenon, but also may be caused by bladder stones, neurogenic bladder and other factors. 1. Physiological phenomenon: hold urine for too long, easy to make the bladder overfilled, bladder muscle may be over-expansion, in the urination will appear in the urinary slowdown, as long as there is no other abnormalities in the performance, will not be overly concerned. 2. Bladder stones: Holding back urine for a long time may result in the formation of bladder stones, which will block the bladder neck, and when urinating, the urine will flow out more slowly, resulting in slower urination, which may be accompanied by difficulty in urination, pain in urination, and frequency of urination, among other symptoms. 3. Neurogenic bladder: due to abnormalities in the nerves that innervate the bladder’s detrusor muscle, which may lead to bladder detrusor muscle weakness, holding urine for a long time, the speed of urination will become slower, and in severe cases, it may also cause urinary retention as well as urinary incontinence. Slow urination after holding urine for a long time may also be caused by other factors, if the symptoms are serious or there are other abnormalities at the same time, we should be vigilant for disease factors, it is recommended to go to the urology department of the regular hospital for appropriate examination and treatment.