Good morning @barryallen8. As promised, I got a good night's sleep and would like to pick up where I left off last night on the mystery of your migrating twinge when urinating. One source of advice comes from the National Institute of Diabetes and Digestive and Kidney Diseases, which may seem unrelated, but the Institute includes the urinary system under the kidney heading. Here's one link to them: https://www.niddk.nih.gov/health-information/urologic-diseases/urinary-tract-how-it-works.

The main control of urination is provided by muscles -- three sets of them -- the bladder sphincter, the urethra tube to the outside from the bladder, and the pelvic floor muscles which support the urethra just below the bladder. Those muscles are activated by instructions from the brain conveyed by nerves to and from the bladder, the urethra, and the pelvic muscles. This raises questions about whether your problem is attributable to your nervous system, which might be the province of a neurologist. Might you have had a transient ischemic attach (TIA) or a minor stroke that could interfere with instructions from your brain? Perhaps an injury to your nerves at any point between your brain, your bladder, and your penis could be the cause -- resulting from a physical accident or from a surgical procedure like I've had on my bladder or prostate?

Another possibility to ask your urologist about is a small growth on the lining of the urethra (downstream from your bladder). In my case, the lining of my bladder produced a number of papilloma tumors. Might similar growths occur on the lining of the urethra as a series of obstructions that developed in sequence over time? Would a cystoscope examination of the lower urinary tract (LUT) reveal whether a LUTO is the cause of your problem?

It doesn't seem to me that you are in particular danger from your relocating twinge. I wasn't endangered by my bladder tumors either when we discovered them, but if I didn't have my prostate surgery, I might have lost my bladder in a matter of months afterward. I hope your medical team will promptly help you solve your mystery symptom -- just to be sure. Martin