There is a condition called Dysreflexia which can happen. If you can't whiz your body can start going into shock. Once symptoms begin it is very important to seek immediate medical help. What they will do is insert a Foley Catheter if it's the bladder and that stops the crisis. This condition is a possibility for spinal cord and spine injury patients. It is not something to let get out of hand. I know this because I was trained to know this from a spinal rehab center. It likely won't happen but it is good to know ahead of time info so you don't let it get too far out of hand.
Thank you so much for the information...I truly appreciate all you have shared with me!