Hidden pain under the right rib cage may be caused by trauma, pleurisy, lung cancer, costochondritis, liver and gallbladder diseases and so on. 1. Trauma: when the skin of the right chest wall is abraded, or the right rib cage is damaged by collision or extrusion, resulting in injury to the rib cage, muscles and blood vessels around the rib cage, it will cause vague pain under the right rib cage. 2. Pleurisy: After bacteria and other pathogens infect the right pleura, it will cause inflammatory exudation, bleeding, adhesion and other lesions on the right pleura, thus causing vague pain under the right rib cage. 3. Lung cancer: after the invasion of lung cancer cells in the middle and advanced stage of right lung to the chest wall, it will stimulate the nerves of chest wall and cause vague pain under right rib cage. 4. Costal chondritis: the cartilage tissue at the junction of sternum and ribs is called costal cartilage, and when the right costal cartilage has inflammatory lesions due to trauma, infection, chronic strain and other factors, vague pain under the right ribs will occur. 5. Liver and gallbladder diseases: the liver and gallbladder are located in the right quarter rib area, chronic hepatitis, liver cancer, chronic cholecystitis and other diseases, stimulate the peripheral nerves to appear right subcostal tenderness. Right subcostal pain may be related to many factors, it is recommended to consult a doctor for a clear diagnosis.