The pain below the right rib cage after eating usually has the following causes: 1. Whether it is a gallbladder or liver disease, such as cholecystitis or gallbladder stones, liver and bile duct stones. This is when the pain occurs after eating, especially when eating fatty foods or eggs, fatty meats and other foods are more obvious. This is because foods with high fat content can stimulate the gallbladder to contract, which will aggravate the pain. 2, whether it is intestinal diseases, such as intestinal tumors or inflammation of the intestine. In this case, there will be obvious pain under the right side of the rib cage after eating, and a stool test or colonoscopy should be performed to further confirm the diagnosis.