Inflammation of the gallbladder, liver and pancreas occurs when gallstones develop in our body . Pressure on different types of nerves is produce when these organs develop inflammation. One of this nerve, the right phrenic nerve can travel upward towards the shoulder and upper back. When you apply pressure to the right phrenic nerve, it produces pain in the right shoulder. This is the reason why many medical resources acknowledge that right shoulder pain is one of the primary symptoms of a gallbladder attack.
