Hidden pain below the right rib cage after sitting for a long time may be caused by costochondritis, trauma or pleural and visceral diseases. 1. Costal chondritis, trauma: the reason for the formation of costal chondritis is still unclear, may be induced by factors such as exertion, infection, immune disorders, is the main cause of pain in the ribs, mostly manifested in the rib cartilage area pain, swelling and other symptoms, most of which are self-limiting, and the healing process is good. Most of them are self-limiting and have a good recovery. Traumatic injuries to the ribs, such as rib fracture and lung contusion, may also cause the above symptoms. 2. Pleural and visceral diseases: the right lower ribs are close to the pleura and lungs, and diseases in these areas may also cause pain in the right lower ribs, such as right pleurisy, right lung pneumonia, etc. In addition, the right lower ribs are deep in the pleura and lungs, which may cause pain in the right lower ribs, such as right pleurisy. In addition, there are organs such as liver and gallbladder deep below the right ribcage, and lesions in these internal organs can also cause the above symptoms, such as gallbladder stones, liver cysts, and hepatic hemangioma. The symptoms of right subcostal pain alone may not be able to accurately determine the cause of the pain, but also need to be combined with the characteristics of the medical history and other test results to make an accurate judgment, it is recommended to clarify the cause of the disease under the guidance of a doctor and targeted treatment.