Spinal nerve cauterization can be done through a procedure called a radiofrequency neurotomy. When a spinal nerve is cauterized it is destroyed resulting in less pain. ... In most cases, the nerves that are cauterized are the small nerve branches of the facet joints located in the back of the spine.
Cauterized = burnt
I had this done years ago. What I didn't know was that nerves can grow back !

Radiofrequency ablation (or RFA) is a procedure used to reduce pain. An electrical current produced by a radio wave is used to heat up a small area of nerve tissue, thereby decreasing pain signals from that specific area.

It could very easily be a torn rotator cuff...It doesn't take much to do the damage!! I have the same symptoms... Both rotators are torn and bone spurs causing problems!

I was having bad pain in my shoulder joints too and it was just like you are describing. Since then a few things have happened and they all helped. It took falling apart and bawling like a baby in the doctor's office before she took me seriously (she is no longer my doctor). Anyway, she ordered some blood work and it showed my inflammation was very high so she sent me to a Rheumatologist. They started me on Plaquenil, which brought down some of the inflammation. My NEW primary doctor referred me to a doctor that does myofascial release therapy and that also helped a great deal. After a year, I think it was, my Rheumatologist said that some of my inflammation markers hadn't changed at all (while other's did) so he thought I might have RA. He started me on Methotrexate and that has helped a lot. Now, I sometimes still have pain when I lift up my arms (like to comb my hair or whatever) but it is no where near as bad. I can do it! I think you should start by talking to your doctor and have them examine your shoulder because there are other things that could cause that kind of pain.

My fiance has a torn rotator cuff and if he was lying down he could lift his arm but if he was setting or standing he couldn't. IDK if that helps you at all but I just thought I'd share. His symptoms were very similar!