I wanted to ask if anyones else has problems with their bladder shutting down or retaining?

My RSD is full body and internal so having issue with my bladder isnt new. Whenever I go into a flair if I dont get to the ER quickly my bladder shuts down, thats what happened yesterday. What my doctor says happens is the signals from the bladder to the brain dont reach each other which leaves me with the inabilitly to use the bathroom. Sometimes when this happens if I am given 150-200mg of IV demerol within an hour my bladder returns but sometimes it doesnt and this time it didnt. Does anyone have any ideas to try and get it to start working again. The ER left the fully in until it returns, I just dont know how and when as sometimes it last up to 2 weeks, so if there is something else I could try I would like to.
Thanks!

Niki