There are more organs on the right side of the body, including the liver, gallbladder, duodenum, gastric sinus, right kidney, right ureter, and in women, the right adnexa and ovary. If there is pain on the right side of the abdomen, consider the possibility of gallbladder stones, cholecystitis or appendicitis. Gallbladder stones are painful in the right upper abdomen and under the right side of the rib cage, and the acute pain is very intense and colicky, sometimes radiating to the back and the right scapula. In the case of appendicitis, the pain is early in the upper abdomen or around the navel, and will shift to the right lower abdomen in about eight hours, and there is fixed pressure pain, an ultrasound of the appendix or a CT examination of the appendix can be performed to aid in the diagnosis.