A celiac plexus block procedure is performed to diagnose pain in the abdominal region that is caused by cancer or pancreatitis. The first step of this procedure is numbing of the skin using a local anesthetic. Once the back is completely numbed, a physician will insert a needle to the celiac plexus nerves using an x-ray or CT scan for guidance. A dye is then injected to assure that the needle placement is correct. The physician will inject anesthetic medicine around the affected nerves to stop pain signals from affecting the brain. The first injection is sometimes administered as a test and if the patient feels relief a permanent injection will be given to provide the patient with immediate and lasting pain relief.