I can't think of any reason it should. Urine is neither corrosive to flesh nor especially toxic.
You hold the urine for some time in urinary bladder. Urinary bladder is situated in your pelvic cavity. The formation of the urine is continuous process. You can not go on urinating continuously. That is why the urinary bladder is there.
The bladder stores urine before it is urinated out of the body.
kidneys produce urine & its collected in the bladder for excecretion.
The bladder.
They carry the urine to the bladder. The urethra takes urine from the bladder to the outside.
A bag like organ that holds urine is the bladder.
the bladder
Bladder
The Kidneys.Kidneys don't hold urine they produce urine which is then stored in the bladder.
Urine is stored in the bladder before excretion.
The bladder.
Removal of urine from the bladder.