Choledochotomy insertion t-tube back pain is caused because the nerves that innervate the gallbladder enter the spinal cord at a comparable location to the nerves in the back, and the nerve pulling during the surgery causes reflex pain in the back. Surgical insertion of the t-tube into the common bile duct is a surgical procedure that can be used to treat gallstones, among other things. If the common bile duct stone is not removed during biliary exploration or if the diameter of the bile duct is ≦1cm, a T-tube can be placed to drain the bile, lower the pressure in the bile duct, and minimize the occurrence of biliary fistulae. Back pain caused by surgical insertion of T-tube is mostly referred pain. The nerves innervating the gallbladder and the nerves innervating the back enter the same spinal cord segment at the same time in the corresponding position and pass into the brain. When the gallbladder nerves are stimulated and pulled during the surgery, the somatic nerves in the corresponding spinal cord segment will also be pulled, thus causing referred pain (also known as radiating pain) in the back. When back pain is caused by the insertion of a t-tube for choledochal surgery, you should seek medical attention in a timely manner and standardize treatment under the guidance of your doctor.