Many persons have asked me about itching and made comments about their cast itching. It seems to be a common problem. So far I have not had any significant problems with the splint/cast itching. This is probably related to my cast being fiberglass, instead of plaster.
I appreciate the support. The catheter that was used in the second procedure was thin. Inserting it into the urethra was definitely unpleasant, but it was not very painful. What was painful was expanding the balloon in the urethra and injecting die into the urethra.
The test did not show any abnormalities, which is good, I suppose. Rather than conduct another even more invasive procedure, my urologist gave me with some medication. I will take it as a trial for 2 weeks and report any symptoms or changes. Hopefully the information can be used to diagnose or correct the problem. If the information is not helpful, then I will try a different type of medication after two weeks.