I did alot of reading on this so I was confident it would not hurt at all....well the "numbing" needle burned but that was no big deal. The 1st needle pinched...but I dealt with the discomfort...the...
It is called referred pain. The internal organs in the abdomen are enclosed in a membrane called the Peritoneum. Whenever the peritoneum is penetrated, the patient gets referred pain in the shoulder....
You hurt yourself (or someone else hurts you) and the nerves pass the information to your brain, explaining you should be hurting, then the brain sends back pain through the nerves the the hurt area,...