The principle of the occurrence of right shoulder back pain in gallbladder stones is that inflammation in the case of cholecystitis can stimulate the right phrenic nerve terminal, and a radiating pain sensation in the skin of the right shoulder occurs. The phrenic nerve is distributed in the skin of the shoulder, and when the impulses of the phrenic nerve terminal, although the phrenic nerve travels to these ganglia, affect the sensory nerve fibers distributed in the skin of the right shoulder, causing the cerebral cortex to misinterpret the pain sensation transmitted from the right shoulder. When inflammation attacks the peritoneum, it will stimulate the peripheral nerves of the abdominal wall, that is, the right intercostal nerve of the spinal nerve. Each nerve is divided into two branches, one of which is the anterior branch of the right 9th intercostal nerve distributed in the gallbladder area of the abdominal wall. discomfort.