Why do I have pain in my arms when I need to pee

If a Western medicine doctor is unable to answer this question for you, you may want to consider having an acupuncture treatment and asking them about this. In Chinese medicine, the meridians are treated, and this condition is sounding to me like it could be associated with a meridian. It may be worth checking out.

@gonzales72 I have never heard of heard of this and I don’t understand how they could be physically related. But as @jkathy pointed out they could be according to Chinese medicine and the theory of meridians. My daughter is a massage therapist and did some study in Beijing, China (where the summer Olympics were once held). She helped me when I had a terrible stomach issue by massaging my legs. Apparently there was a connection between these different areas according to this meridian theory and what she learned from Chinese medicine. At that same time I also tried acupuncture that my daughter recommended but noticed no change whatsoever.
Another possibility comes from a psychological perspective (my area of professional expertise). Sometimes two seemingly unrelated events occur within a similar timeframe and end up becoming psychologically related (unbeknownst to the individual). This is one of the principles behind the development of phobias. But the good news is that it is also a principle involved in behavior modification. The stimulus, response and consequence can be engineered to affect beneficial change. Sorry to dump psycho babble on you but it is my background.
Another idea you might find beneficial is this. There is a book available at Mayo Clinic Press all about the types, causes and treatments of incontinence. I have struggled with incontinence myself and found this book to be helpful.
Last but not least please know that you are not alone. You’ve seen how @jkathy and I chimed in to this discussion. Hopefully more members will have input soon.

Thank you for your input. I sometimes wonder if might have a UTI but when I went to the Dr. she couldn't find anything . Perhaps it is all in my head.

It’s not in your head! I get that exact sensation- it feels like intense referred nerve pain in other parts of my body- most notably down my right arm. (I’ve never met anyone else that experiences this, so I’m glad you asked the question!)
It’s gotta be a nervous system thing, like overwhelmed nerves spilling out the sensation to other parts of the body
I never thought about using acupuncture for this, but it seems like a valid effort!

I get pains in my hands just before I pee. Foctor’s do t believe me.

I would not necesarily say the doctors do not believe you. In my experience it they don't know how to help or where they might refer you they smile and nod their heads.

I have overactive bladder with constant urgency. Every time I pee I get electric shock like sensations from my neck down both arms to my fingers. It is unpleasant and quite painful. I am wondering if due to vaginal atrophy (I am 79) there is some kind of prolapse pushing on a nerve. I have an upcoming MD appt to discuss this.

@kjaffee
I hope that you will let us know what the doctor says. This is a fascinating topic; I'd never heard of pain in the arms when needing to pee, but I can understand it happening. Sometimes when I get a massage, massaging my leg creates a stinging in the side of my torso.

@cehunt57
I trained my brain to associate the smell of oil of oregano with having a bowel movement. It won't happen if I don't have to go, but it hurries things along. It's really great!

@kjaffee
I have now gone to my primary care, who believed me about the electric shocks going down my arms and she diagnosed vaginal prolapse. I will be having pelvic floor therapy and if that doesn't work, I will have an MRI of my cervical spine. It is possible that the shocking may be due to a problem with the spine rather than the bladder.