Abdominal pain is defined as discomfort anywhere in the abdomen — between the ribs and the pelvis. We often refer to abdominal pain as “stomach pain” or “stomachache,” but the pain in your abdomen could be caused by organs other than your stomach. Your stomach, liver, gallbladder, pancreas, small intestine, and large intestine are all housed in your abdomen. These are all digestive system organs. However, pain can also be felt in your abdominal wall, which is made up of skin and muscles. And sometimes the pain in your stomach comes from somewhere else, such as your chest, pelvis, or back.